# Interstate 10 in California

Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California, to Jacksonville, Florida. The segment of I-10 in California, also known as the Pearl Harbor Memorial Highway, runs east from Santa Monica through Los Angeles, San Bernardino, and Palm Springs before crossing into the state of Arizona. In the Greater Los Angeles area, it is known as the Santa Monica and San Bernardino freeways, linked by a short concurrency on I-5 (Golden State Freeway) at the East Los Angeles Interchange. I-10 also has parts designated as the Rosa Parks and Sonny Bono Memorial freeways. Some parts were also formerly designated as the Christopher Columbus Transcontinental Highway. However, the California State Legislature removed this designation following the passage of a bill on August 31, 2022. I-10 is also known colloquially as "the 10" to Southern California residents (See also California English § Freeways).
The entirety of Interstate 10 in California is defined in the California Streets and Highways Code as Route 10.

## Route description

The California Streets and Highways Code defines Route 10 (I-10) from:
   (a) Route 1 [State Route 1 (SR 1)] in Santa Monica to Route 5 [I-5] near Seventh Street in Los Angeles. (b) Route 101 [US Route 101 (US 101)] near Mission Road in Los Angeles to the Arizona state line at the Colorado River via the vicinity of Monterey Park, Pomona, Colton, Indio, and Chiriaco Summit and via Blythe.
Because I-10 west of I-5 cannot access US 101, and I-10 east of I-5 cannot access US 101 southbound, signage instead directs motorists to the continuation of I-10 via I-5 between the East Los Angeles Interchange and the Santa Monica Freeway. The Federal Highway Administration (FHWA)'s Interstate Highway route logs, along with most maps, also indicate that I-10 is cosigned along this segment, despite the legal definition. The short unsigned section of Route 10 between Route 5 and Route 101, which was formerly defined as Route 110 (signed as I-110) until 1968, carries overhead signage for I-10 eastbound and for US 101 westbound.
I-10 is part of the California Freeway and Expressway System and is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the FHWA. I-10 is eligible to be included in the State Scenic Highway System, but it is not officially designated as a scenic highway by Caltrans. The Santa Monica Freeway is I-10 from SR 1 to I-5, as named by the State Highway Commission on April 25, 1957. The section between the Harbor (I-110) and San Diego (I-405) freeways is also signed as the Rosa Parks Freeway, after the African-American civil rights activist. The I-10 freeway is signed as the Christopher Columbus Transcontinental Highway in Santa Monica. The removal of this designation, however, may result in the eventual removal of this signage.

### Santa Monica Freeway

The Santa Monica Freeway is the westernmost segment of I-10, beginning at the east end of the McClure Tunnel in Santa Monica and ending southeast of Downtown Los Angeles at the East Los Angeles Interchange.
I-10 begins its eastward journey in the city of Santa Monica after SR 1 turns east through the McClure Tunnel. Note that the McClure Tunnel is part of SR 1 in its entirety, and the western terminus of I-10 is to the east of the tunnel at 4th Street. SR 1 then exits onto Lincoln Boulevard and heads south while I-10 continues east. Soon after it enters the city of Los Angeles, I-10 has a four-level interchange with I-405. I-10 then continues through Sawtelle, Rancho Park, Cheviot Hills, Beverlywood, and Crestview in West Los Angeles; Lafayette Square and Wellington Square in Mid City; and Arlington Heights, West Adams, and Jefferson Park into Downtown Los Angeles. On the western edge of downtown at the Dosan Ahn Chang Ho Memorial Interchange, I-10 has an interchange with I-110 to the south and SR 110 to the north. I-10 then travels along the southern edge of downtown to the East Los Angeles Interchange.
At the East Los Angeles Interchange, SR 60 diverges east toward Riverside and Pomona. I-10 then turns north, running concurrently with I-5 for approximately 1.5 miles (2.4 km). Then, I-10 heads east and merges with the traffic from the spur to US 101 onto the San Bernardino Freeway.
The freeway is 14 lanes wide (two local and five express lanes in each direction) from the Harbor Freeway (I-110) interchange to the Arlington Avenue offramp. Most of these lanes are full at peak travel times (even on Saturdays). The remainder of the freeway varies between eight and 10 lanes in width. The whole freeway opened in 1965 with four to six lanes, with a formal dedication held in 1966.
While the construction of the Century Freeway several miles to the south reduced traffic congestion to a considerable amount by creating an alternate route from downtown to Los Angeles International Airport, the Santa Monica Freeway is still one of the busiest freeways in the world. All three freeway-to-freeway interchanges along its length are notorious for their congestion and are routinely ranked among the top 10 most congested spots in the US.
Due to the high traffic volume, car accidents are so common that Caltrans has constructed special accident investigation sites separated from the freeway by fences. These enable the California Highway Patrol to quickly clear accidents from the through traffic lanes, and the fences reduce congestion by preventing rubbernecking (in which vehicles slow down so their occupants can watch the accident investigation).
The Santa Monica Freeway is considered the border between Downtown and South Los Angeles. Part of the freeway also skims the Byzantine-Latino Quarter.

### San Bernardino Freeway

I-10 heads east from the East Los Angeles Interchange to I-710 in Monterey Park. It then continues through the San Gabriel Valley suburbs of Alhambra, Rosemead, San Gabriel, El Monte, and Baldwin Park before intersecting with I-605. It then travels through West Covina, briefly enters Covina, and then travels up the Kellogg Hill into San Dimas, where I-10 intersects with SR 57 (formerly part of I-210) and SR 71 at the Kellogg Interchange. I-10 then heads east through Pomona and Claremont, leaving Los Angeles County to enter San Bernardino County.
In San Bernardino County, I-10 travels through Montclair, Upland, and Ontario, providing access to Ontario International Airport. I-10 then has a four-level interchange with I-15 before traveling through Fontana, Rialto, and Colton. I-10 then intersects with I-215, where the San Bernardino Freeway ends, before briefly entering San Bernardino city proper and traveling through Loma Linda and Redlands. In Redlands, I-10 intersects with the SR 210 freeway (future I-210) and with SR 38 before entering Yucaipa and eventually Riverside County.
In 2019, SBCTA planned to add two more interchanges in Fontana at Beech and Alder Avenues to reduce congestion at the Sierra and Cherry avenue exits.

### Riverside County

In Riverside County, I-10 goes through Calimesa before entering Beaumont and merging with the eastern end of SR 60 (itself formerly the California segment of US 60). In Banning, I-10 has a diamond intersection with SR 243 before passing through San Gorgonio Pass between the San Bernardino and San Jacinto mountains (where the vegetation makes a rapid change between Mediterranean and desert ecology) and entering Palm Springs. The next 35 miles (56 km) of the freeway, between SR 111 and Dillon Road, was named the Sonny Bono Memorial Freeway in 2002. Although I-10 intersects with the northern terminus of SR 111, the major artery to Palm Springs, it mostly bypasses the city, then connects to SR 62, a major east–west route through the Colorado Desert. I-10 cuts through Cathedral City and passes just outside the northern city limits of Rancho Mirage, Palm Desert, and La Quinta before entering Indio. I-10 then has an interchange in Coachella with the northern end of the SR 86 expressway, which also leads to SR 111.
Several miles east and roughly halfway between Indio and Blythe, in the community of Desert Center, I-10 intersects with SR 177, a turnoff that leads to Desert Center Airport and connects to SR 62. Three miles (4.8 km) south of I-10 at the Wiley's Well exit, between Desert Center and Blythe, are the Chuckawalla Valley and Ironwood state prisons. Near the Arizona state line, I-10 meets the terminus of SR 78. In the city of Blythe, I-10 runs concurrently with US 95 as both routes cross the Colorado River into Arizona.
The speed limit on the entire Riverside County segment of I-10 is 70 mph (110 km/h). I-10 westbound is usually signed as toward San Bernardino and/or Los Angeles in the Colorado Desert. Eastbound, in the San Gorgonio Pass, the signage indicates "Indio, Other Desert Cities" and indicates "Blythe" after Indio; the first sign for Phoenix does not occur until Indio.

## Express lanes

There are two sections of high-occupancy toll (HOT) lanes along I-10, one in Los Angeles County and the other in San Bernardino County.
In Los Angeles County, the El Monte Busway is a grade-separated, shared-use HOT and express bus corridor running along the San Bernardino Freeway between Alameda Street near Union Station in Downtown Los Angeles and a point west of I-605 in El Monte. From Alameda Street to I-710, the El Monte Busway runs parallel to the north side of the freeway. After the I-710 interchange, these lanes merge back to the median of I-10. Eastbound busses exit the HOT lanes at El Monte Station west of I-605. The segment of the El Monte Busway between Alameda Street and Del Mar Avenue in San Gabriel carries the hidden state designation of Route 10S (for "supplemental").
The segment of HOT lanes in San Bernardino County opened in 2024, and runs between the Los Angeles county line and Etiwanda Avenue at the Ontario–Fontana city limit.
As of January 2025, some toll polices differ between the counties. The HOT lanes in Los Angeles County is part of the Metro ExpressLanes project administered by the Los Angeles County Metropolitan Transportation Authority (LA Metro), while the ones in San Bernardino County are operated by the San Bernardino County Transportation Authority (SBCTA) and using Transportation Corridor Agencies (TCA) as the processing partner. In both segments, solo drivers are tolled using a congestion pricing system based on the real-time levels of traffic. Carpools with three or more people and motorcycles are not charged. For two-person carpools using the Los Angeles County segment, they are charged the posted toll during the peak hours between 5:00 am and 9:00 am, and between 4:00 pm and 7:00 pm; no toll is charged during off-peak hours. Two-person carpools using the San Bernardino County segment do not receive any discount. All tolls are collected using an open road tolling system, and therefore there are no toll booths to receive cash. Each vehicle using the HOT lanes is required to carry a FasTrak Flex transponder with its switch set to indicate the number of the vehicle's occupants (1, 2, or 3+). Those with clean air vehicles need to apply to get discounts (15 percent in Los Angeles County and 10 percent in San Bernardino County). Solo drivers may also use the FasTrak standard tag without the switch.
Drivers without any FasTrak tag will be assessed a toll violation regardless of whether they qualified for free. For those violators on the San Bernardino County segment, they will get TCA's benefit of being able to pay online 5 days after their trip without an additional toll violation penalty.
There are longer-term plans to have continuous HOT lanes between Alameda Street in Los Angeles and Ford Street in Redlands. This expansion is planned in four phases. As of 2024, the proposed segment in Los Angeles County to bridge the gap between I-605 and the San Bernardino County line is under environmental review, the section from Etiwanda Avenue to Pepper Avenue in Colton is planned to break ground in 2025, and the segment to Ford Street in Redlands is still in the planning stage.

## History

What is now I-10 east of Los Angeles was generally part of the Atlantic and Pacific Highway, one of many transcontinental national auto trails. By 1926, when the US Numbered Highways were assigned, the road across the desert east of Indio was unimproved, while the road from Indio west to San Bernardino (as well as various roads west to Los Angeles) was paved. In late 1926, US 99 was designated along the section of road from San Bernardino to Indio, where it turned south along present SR 86 on the west side of the Salton Sea. West of San Bernardino, US 99 ran to Los Angeles, concurrent with US 66 (via Pasadena) before turning north; this route to Los Angeles is north of the later alignment of I-10. The piece of this between San Bernardino and Indio was defined in 1915 as Legislative Route 26 (LR 26). (It continued south from Indio via El Centro to Heber. A 1931 extension took it south to Calexico on present SR 111.)
The route from Indio via Mecca to the Arizona state line near Blythe was defined in 1919 as pre-1964 LR 64. (Later extensions took LR 64 west along present SR 74; a 1931 cutoff bypassed Mecca to the north.) LR 26 was extended west from San Bernardino to Los Angeles in 1931, running along an alignment south of the existing US 66/US 99. Neither of these was a signed route until around 1932, when US 60 was extended west from Arizona to Los Angeles, running along LR 64 to Indio, LR 26 (with US 99) to Beaumont, pre-1964 LR 19 to Pomona, and LR 26 to Los Angeles. (The original alignment of LR 26 ran roughly where SR 60 now is west of Pomona, but an alignment close to present I-10 opened around 1934).
Thus, in 1931, what is now I-10 east of Los Angeles had been defined as LR 26 from Los Angeles to Indio and LR 64 from Indio to Arizona. It was signed as US 99 from San Bernardino to Indio, and US 60 came along around 1932 from Los Angeles to Pomona and from Beaumont to Arizona. US 70 was extended west from Arizona c. 1936 along the whole route to Los Angeles, and, between 1933 and 1942, US 99 moved from US 66 to present I-10 between San Bernardino and Los Angeles, forming a three-way concurrency between Pomona and Los Angeles. Old alignments and names include Valley Boulevard, Ramona Boulevard, and Garvey Avenue.
I-10 holds the distinction of being the first freeway in Los Angeles. A four-mile (6.4 km) section of today's freeway was built between 1933 and 1935 at a cost of $877,000 (equivalent to $15.3 million in 2023). The "Ramona Boulevard" highway linked downtown Los Angeles to the communities of the southern San Gabriel Valley. The roadway, which opened on April 20, 1935, was dubbed the "Air Line route" and was seen as a major achievement in traffic design.
The route east from Los Angeles was added to the Interstate Highway System on August 7, 1957. It was assigned the I-10 number on August 14, 1957, and the short piece west of I-5 was approved as I-110 on November 10, 1958. By then, most if not all of the San Bernardino Freeway had been completed, and I-10 was signed along the existing freeway along with US 70, US 99, and part of US 60. US 70 and US 99 were removed in the 1964 renumbering, while US 60 was removed in 1972, leaving only I-10.
The part west of Downtown Los Angeles was pre-1964 LR 173, defined in 1933 from Santa Monica to Downtown Los Angeles. It was signed as SR 26 by 1942, running primarily Olympic Boulevard. It was later replaced by the Santa Monica Freeway and added to the Interstate Highway System on September 15, 1955. It too was assigned the I-10 number on August 14, 1957. It was completed c. 1964 and became I-10 in the 1964 renumbering.
Portions of the Santa Monica Freeway going over La Cienega Boulevard collapsed after the Northridge earthquake on January 17, 1994, and were rebuilt using new seismic-resistant bridge designs.
The El Monte Busway was converted to HOT lanes in 2013 as part of the Metro ExpressLanes project.
On July 19, 2015, a bridge carrying the eastbound lanes of I-10 near Desert Center collapsed from floodwater from the remnants of Hurricane Dolores, trapping a vehicle.
Shortly after midnight of November 11, 2023, a mile-long (1.6 km) segment of the freeway in Downtown Los Angeles between Alameda Street and Santa Fe Avenue suffered significant damage due to a fire at a pallet yard underneath the freeway. The fire melted the freeway's guardrails and damaged the supporting concrete columns. The Los Angeles Times reported a couple of days later that "sanitizer accumulated during the height of the COVID-19 pandemic was stored under the overpass and helped fuel the flames". Governor Gavin Newsom declared a state of emergency in response to the fire; the freeway was reopened after eight days, far ahead of the original five-week estimate.

### Juan Bautista de Anza National Historic Trail

The I-10 is part of the auto tour route of the Juan Bautista de Anza National Historic Trail, a National Park Service unit in the US national Historic and Millennium trail programs. In 2005, Caltrans began posting signs on roads that overlap with the historic 1776 Juan Bautista de Anza trail route, so that California drivers can now follow the trail.

## Exit list

| County | Location | mi | km | Exit | Destinations | Notes |
| Los Angeles | Santa Monica | 0.00 | 0.00 | | SR 1 north (Pacific Coast Highway) – Oxnard | Western end of SR 1 concurrency; former US 101 Alternate; western end of I-10/Santa Monica Freeway |
| Los Angeles | Santa Monica | 0.00 | 0.00 | 1A | 4th Street / 5th Street | Westbound exit and eastbound entrance |
| Los Angeles | Santa Monica | 0.96 | 1.54 | 1B | Lincoln Boulevard to SR 1 south | Eastern end of SR 1 concurrency; signed as exit 1A eastbound; former SR 2 / US 66 / US 101 Alternate |
| Los Angeles | Santa Monica | 0.96 | 1.54 | 1B | 20th Street | Eastbound exit and westbound entrance |
| Los Angeles | Santa Monica | 2.08 | 3.35 | 1C | Cloverfield Boulevard | Westbound exit and eastbound entrance |
| Los Angeles | Santa Monica | 2.30 | 3.70 | 2A | Centinela Avenue | Signed as exit 2 eastbound |
| Los Angeles | Los Angeles | 2.35 | 3.78 | 2B-C | Bundy Drive | Westbound exits and eastbound entrance; signed as exits 2B (south) and 2C (north) |
| Los Angeles | Los Angeles | 3.11 | 5.01 | 3A | I-405 north (San Diego Freeway) – Sacramento | I-405 north exit 53B, south exit 53 |
| Los Angeles | Los Angeles | 3.29 | 5.29 | 3B | I-405 south (San Diego Freeway) – LAX Airport, Long Beach | I-405 north exit 53B, south exit 53 |
| Los Angeles | Los Angeles | 4.24 | 6.82 | 4 | Overland Avenue / National Boulevard | National Boulevard not signed westbound |
| Los Angeles | Los Angeles | 5.05 | 8.13 | 5 | National Boulevard | Westbound exit and eastbound entrance |
| Los Angeles | Los Angeles | 5.76 | 9.27 | 6 | Robertson Boulevard – Culver City | |
| Los Angeles | Los Angeles | 6.81 | 10.96 | 7A | SR 187 (Venice Boulevard) / La Cienega Boulevard | SR 187 / Venice Boulevard not signed eastbound |
| Los Angeles | Los Angeles | 7.00 | 11.27 | 7B | Fairfax Avenue / Washington Boulevard | Washington Boulevard not signed eastbound |
| Los Angeles | Los Angeles | 8.27 | 13.31 | 8 | La Brea Avenue | |
| Los Angeles | Los Angeles | 9.23 | 14.85 | 9 | Crenshaw Boulevard | |
| Los Angeles | Los Angeles | 10.16 | 16.35 | 10 | Arlington Avenue | |
| Los Angeles | Los Angeles | 10.66 | 17.16 | 11 | Western Avenue | |
| Los Angeles | Los Angeles | 10.66 | 17.16 | 12 | Normandie Avenue | Westbound exit is part of exit 11 |
| Los Angeles | Los Angeles | 11.64– 12.25 | 18.73– 19.71 | 12 | Vermont Avenue / Hoover Street | |
| Los Angeles | Los Angeles | 12.68 | 20.41 | 13A | I-110 south (Harbor Freeway south) / Grand Avenue – San Pedro, Convention Center | Dosan Ahn Chang Ho Memorial Interchange; signed as exit 13 westbound; Grand Avenue is not accessible westbound; Pico Boulevard is not accessible eastbound; I-110 exit 21 |
| Los Angeles | Los Angeles | 12.73 | 20.49 | 13B | SR 110 north (Harbor Freeway north) / Pico Boulevard – Pasadena, Downtown, Convention Center | Dosan Ahn Chang Ho Memorial Interchange; signed as exit 13 westbound; Grand Avenue is not accessible westbound; Pico Boulevard is not accessible eastbound; I-110 exit 21 |
| Los Angeles | Los Angeles | 13.64 | 21.95 | 14A | Maple Avenue | Eastbound exit and westbound entrance |
| Los Angeles | Los Angeles | 13.64 | 21.95 | 14A | Los Angeles Street – Convention Center | Westbound exit and eastbound entrance |
| Los Angeles | Los Angeles | 14.22 | 22.88 | 14B | San Pedro Street | No westbound entrance |
| Los Angeles | Los Angeles | 14.55 | 23.42 | 15A | Central Avenue | |
| Los Angeles | Los Angeles | 15.19 | 24.45 | 15B | Alameda Street | |
| Los Angeles | Los Angeles | 15.55 | 25.03 | 16A | Mateo Street / Santa Fe Avenue | |
| Los Angeles | Los Angeles | 16.23 | 26.12 | 16B | SR 60 east (Pomona Freeway) – Pomona | Eastbound exit and westbound entrance; western end of East Los Angeles Interchange; SR 60 west exit 1A; I-5 north exit 134A |
| Los Angeles | Los Angeles | 16.23 | 26.12 | 16B | I-5 south (Santa Ana Freeway) – Santa Ana | Eastbound exit and westbound entrance; western end of East Los Angeles Interchange; SR 60 west exit 1A; I-5 north exit 134A |
| Los Angeles | Los Angeles | 16.23 | 26.12 | — | Boyle Avenue | Eastbound exit only |
| Los Angeles | Los Angeles | 16.23 | 26.12 | 16B | I-5 south (Santa Ana Freeway) / Soto Street – Santa Ana | Western end of I-5 overlap; eastern end of East Los Angeles Interchange proper; westbound exit and eastbound entrance; eastern end of Santa Monica Freeway; SR 60 west exit 1E |
| Los Angeles | Los Angeles | 16.23 | 26.12 | 16B | SR 60 east (Pomona Freeway) – Pomona | Western end of I-5 overlap; eastern end of East Los Angeles Interchange proper; westbound exit and eastbound entrance; eastern end of Santa Monica Freeway; SR 60 west exit 1E |
| Los Angeles | Los Angeles | | | 135A | Fourth Street | |
| Los Angeles | Los Angeles | | | 135B | Cesar Chavez Avenue | Eastbound exit and westbound entrance; formerly Brooklyn Avenue |
| Los Angeles | Los Angeles | 19.00– 19.07 | 30.58– 30.69 | 19A | State Street | Westbound left exit and eastbound entrance |
| Los Angeles | Los Angeles | 19.00– 19.07 | 30.58– 30.69 | 19B | I-5 north (Golden State Freeway) – Sacramento | Eastern end of I-5 overlap; 5-10 Split portion of the East Los Angeles Interchange; I-5 north exit 135C, south exit 135B |
| Los Angeles | Los Angeles | 19.00– 19.07 | 30.58– 30.69 | 19B | San Bernardino Freeway spur to US 101 north (Santa Ana Freeway) – Los Angeles | Westbound left exit and eastbound entrance; US 101 exit 1D |
| Los Angeles | Los Angeles | 19.00– 19.07 | 30.58– 30.69 | 19C | Soto Street | No eastbound entrance; signed as exit 19 eastbound |
| Los Angeles | Los Angeles | | | — | Marengo Street | Eastbound entrance only |
| Los Angeles | East Los Angeles | 19.59 | 31.53 | 20A | City Terrace Drive | Eastbound exit and westbound entrance |
| Los Angeles | East Los Angeles | 20.24 | 32.57 | 20B | Eastern Avenue | Westbound access is part of the I-710 exit; serves CSU Los Angeles |
| Los Angeles | Monterey Park | 20.77 | 33.43 | 21 | I-710 (Long Beach Freeway) / Valley Boulevard – Long Beach | Eastbound exit provides direct access to Ramona Road; I-710 north exit 22, south exits 22A-B |
| Los Angeles | Alhambra | | | — | El Monte Busway (SR 10S west) to US 101 north / Alameda Street | Express Lanes access only; westbound exit and eastbound entrance |
| Los Angeles | Alhambra | | | — | I-10 LA Metro Express Lanes | Westernmost access point from mainline I-10 |
| Los Angeles | Alhambra | 21.70 | 34.92 | 22 | Fremont Avenue – South Pasadena | |
| Los Angeles | Alhambra | 22.72 | 36.56 | 23A | Atlantic Boulevard – Monterey Park | |
| Los Angeles | Alhambra | 23.38 | 37.63 | 23B | Garfield Avenue | |
| Los Angeles | Alhambra–San Gabriel– Monterey Park tripoint | 24.22 | 38.98 | 24 | New Avenue | |
| Los Angeles | San Gabriel–Rosemead line | 24.72 | 39.78 | — | Del Mar Avenue | Express Lanes access only; eastbound exit and westbound entrance |
| Los Angeles | San Gabriel–Rosemead line | 24.72 | 39.78 | 25A | Del Mar Avenue | Previously exit 25B |
| Los Angeles | San Gabriel–Rosemead line | 25.23 | 40.60 | 25B | San Gabriel Boulevard | |
| Los Angeles | Rosemead | 25.73 | 41.41 | 26A | Walnut Grove Avenue | |
| Los Angeles | Rosemead–El Monte line | 26.25 | 42.25 | 26B | SR 19 (Rosemead Boulevard) – Pasadena | Eastbound exit provides direct access to Flair Drive |
| Los Angeles | Rosemead–El Monte line | 27.35 | 44.02 | 27 | Temple City Boulevard | Westbound signage; previously exit 28 |
| Los Angeles | Rosemead–El Monte line | 27.35 | 44.02 | 27 | Baldwin Avenue | Eastbound signage |
| Los Angeles | Rosemead–El Monte line | 27.35 | 44.02 | — | El Monte Busway east to El Monte Station | Buses only via Express Lanes; eastbound exit and westbound entrance |
| Los Angeles | El Monte | 28.06 | 45.16 | 28 | Santa Anita Avenue | Previously exit 29 |
| Los Angeles | El Monte | 28.89 | 46.49 | 29A | Peck Road South | |
| Los Angeles | El Monte | 28.94– 29.22 | 46.57– 47.03 | 29B | Peck Road North, Valley Boulevard | Westbound exits signed as 29B (Valley Boulevard) and 29C (Peck Road North) |
| Los Angeles | El Monte | | | — | I-10 LA Metro Express Lanes | Eastern end of Express Lanes |
| Los Angeles | El Monte | | | — | I-10 LA Metro Express Lanes (eastern expansion) | Western end of proposed expansion |
| Los Angeles | El Monte | 29.97 | 48.23 | 30 | Garvey Avenue, Durfee Avenue | Westbound exit and eastbound entrance |
| Los Angeles | Baldwin Park | 30.54 | 49.15 | 31A | I-605 south (San Gabriel River Freeway) | Signed as exit 31A westbound; I-605 exit 22 |
| Los Angeles | Baldwin Park | 30.59 | 49.23 | 31B | I-605 north (San Gabriel River Freeway) | Signed as exit 31A westbound; I-605 exit 22 |
| Los Angeles | Baldwin Park | 30.59– 30.93 | 49.23– 49.78 | 31C | Frazier Street | Signed as exit 31B westbound; no eastbound entrance |
| Los Angeles | Baldwin Park | 31.61 | 50.87 | 32A | Baldwin Park Boulevard | |
| Los Angeles | Baldwin Park | 32.05 | 51.58 | 32B | Francisquito Avenue – La Puente | No eastbound entrance; previously exit 33A |
| Los Angeles | Baldwin Park | 32.74 | 52.69 | 33 | Puente Avenue – Industry | |
| Los Angeles | West Covina | 33.85 | 54.48 | 34A | Pacific Avenue, West Covina Parkway | Signed as exit 34 eastbound |
| Los Angeles | West Covina | 34.24 | 55.10 | 34B | Sunset Avenue | Westbound exit only |
| Los Angeles | West Covina | 34.78 | 55.97 | 35 | Vincent Avenue | |
| Los Angeles | West Covina | 35.89 | 57.76 | 36 | SR 39 (Azusa Avenue) | |
| Los Angeles | West Covina | 36.87 | 59.34 | 37A | Citrus Street | |
| Los Angeles | West Covina | 37.40 | 60.19 | 37B | Barranca Street | |
| Los Angeles | West Covina | 37.90 | 60.99 | 38A | Grand Avenue | |
| Los Angeles | West Covina–Covina line | 38.39 | 61.78 | 38B | Holt Avenue | |
| Los Angeles | Covina–San Dimas line | 39.85 | 64.13 | 40 | Via Verde | |
| Los Angeles | Pomona | 41.41 | 66.64 | 41 | Kellogg Drive – Cal Poly University | No eastbound entrance |
| Los Angeles | Pomona–San Dimas line | 41.83 | 67.32 | 42A | SR 57 (Orange Freeway) to I-210 (Foothill Freeway) – Santa Ana | Western end of Kellogg Interchange; signed as exit 42 westbound; SR 57 north is former I-210; SR 57 north exit 21, south exits 22A-B |
| Los Angeles | Pomona–San Dimas line | 42.07 | 67.71 | 42B | SR 71 south (Chino Valley Freeway) / Campus Drive – Corona | Eastbound exit and westbound entrance; eastern end of Kellogg Interchange; SR 71 north exit 15 |
| Los Angeles | Pomona | 43.05– 43.58 | 69.28– 70.14 | 44 | Fairplex Drive, Dudley Street | Signed as exits 43 (Fairplex Drive) and 44 (Dudley Street) eastbound; Fairplex Drive was formerly Ganesha Boulevard; serves Fairplex |
| Los Angeles | Pomona | 44.67 | 71.89 | 45A | White Avenue | Eastbound exit and westbound entrance; former exit 45 |
| Los Angeles | Pomona | 45.12 | 72.61 | 45B | Garey Avenue, Orange Grove Avenue | Signed as exit 45 westbound; Orange Grove Avenue not signed eastbound |
| Los Angeles | Pomona | 45.80 | 73.71 | 46 | Towne Avenue | |
| Los Angeles | Claremont | 47.13 | 75.85 | 47 | Indian Hill Boulevard | |
| Los Angeles–San Bernardino county line | Claremont–Montclair line | | | — | I-10 LA Metro Express Lanes (eastern expansion) | Western end of proposed expansion |
| Los Angeles–San Bernardino county line | Claremont–Montclair line | | | — | I-10 San Bernardino Express Lanes | Western end of express lane; opened in 2024 |
| San Bernardino | Montclair | 48.34 | 77.80 | 48 | Monte Vista Avenue | |
| San Bernardino | Montclair | 48.89 | 78.68 | 49 | Central Avenue | |
| San Bernardino | Ontario–Upland line | 50.03 | 80.52 | 50 | Mountain Avenue – Mount Baldy | |
| San Bernardino | Ontario–Upland line | 51.13 | 82.29 | 51 | SR 83 (Euclid Avenue) – Ontario, Upland | |
| San Bernardino | Ontario | 52.90 | 85.13 | 53 | 4th Street | |
| San Bernardino | Ontario | 53.76 | 86.52 | 54 | Vineyard Avenue | |
| San Bernardino | Ontario | 54.82 | 88.22 | 55A | Holt Boulevard | Westbound exit and eastbound entrance; former US 99 north |
| San Bernardino | Ontario | 54.82 | 88.22 | 55B | Archibald Avenue – Ontario Airport | Single-point urban interchange, signed as exit 55 eastbound |
| San Bernardino | Ontario | 55.83 | 89.85 | 56 | Haven Avenue | |
| San Bernardino | Ontario | 56.84 | 91.48 | 57 | Milliken Avenue | |
| San Bernardino | Ontario | 57.60 | 92.70 | 58A | I-15 north (Ontario Freeway) – Barstow | Signed as exit 58 westbound; I-15 exits 109A-B |
| San Bernardino | Ontario | 57.60 | 92.70 | 58B | I-15 south (Ontario Freeway) – San Diego | Signed as exit 58 westbound; I-15 exits 109A-B |
| San Bernardino | Ontario–Fontana line | 58.79 | 94.61 | 59 | Etiwanda Avenue, Valley Boulevard | Valley Boulevard was former US 99 south |
| San Bernardino | Ontario–Fontana line | | | — | I-10 San Bernardino Express Lanes | Eastern end of express lane; opened in 2024 |
| San Bernardino | Ontario–Fontana line | | | — | I-10 San Bernardino Express Lanes (eastern expansion) | Western end of proposed expansion |
| San Bernardino | Fontana | 60.83 | 97.90 | 61 | Cherry Avenue | |
| San Bernardino | Fontana | 62.84 | 101.13 | 63 | Citrus Avenue | |
| San Bernardino | Fontana | 63.88 | 102.80 | 64 | Sierra Avenue | Single-point urban interchange |
| San Bernardino | Bloomington | 66.15 | 106.46 | 66 | Cedar Avenue – Bloomington | |
| San Bernardino | Rialto | 67.63 | 108.84 | 68 | Riverside Avenue | |
| San Bernardino | Colton | 68.63 | 110.45 | 69 | Pepper Avenue | |
| San Bernardino | Colton | 69.62 | 112.04 | 70A | Rancho Avenue | |
| San Bernardino | Colton | 70.28 | 113.10 | 70B | 9th Street – Downtown Colton | |
| San Bernardino | Colton | 70.91 | 114.12 | 71 | Mt. Vernon Avenue | |
| San Bernardino | Colton | 71.90 | 115.71 | 72 | I-215 – San Bernardino, Barstow, Riverside | Former I-15E / US 91 / US 395; eastern end of San Bernardino Freeway; I-215 north exit 40A-B, south exit 40 |
| San Bernardino | San Bernardino | 72.92 | 117.35 | 73 | Waterman Avenue | Signed as exits 73A (south) and 73B (north) eastbound |
| San Bernardino | San Bernardino–Loma Linda line | 73.93 | 118.98 | 74 | Tippecanoe Avenue, Anderson Street – San Bernardino International Airport, Loma Linda University | |
| San Bernardino | Loma Linda | 74.96 | 120.64 | 75 | Mountain View Avenue | |
| San Bernardino | Redlands | 75.96 | 122.25 | 76 | California Street | |
| San Bernardino | Redlands | 76.97 | 123.87 | 77A | Alabama Street | |
| San Bernardino | Redlands | 77.29 | 124.39 | 77B | SR 210 west (Foothill Freeway) to SR 330 north – Pasadena, Running Springs | Former SR 30 west; SR 210 east exits 85A-B; future I-210 west; signed as exit 77C westbound |
| San Bernardino | Redlands | 77.45 | 124.64 | 77C | Tennessee Street | Signed as exit 77B westbound |
| San Bernardino | Redlands | 78.56 | 126.43 | 79 | SR 38 east (Orange Street) / Eureka Street | Eastbound signage |
| San Bernardino | Redlands | 78.56 | 126.43 | 79 | 6th Street to SR 38 – Big Bear | Westbound signage |
| San Bernardino | Redlands | 79.53 | 127.99 | 80 | University Street | Eastbound signage |
| San Bernardino | Redlands | 79.53 | 127.99 | 80 | Cypress Avenue | Westbound signage |
| San Bernardino | Redlands | 80.79 | 130.02 | 81 | Ford Street, Redlands Boulevard | Redlands Boulevard is former US 99 north |
| San Bernardino | Redlands | | | — | I-10 San Bernardino Express Lanes (eastern expansion) | Eastern end of proposed expansion |
| San Bernardino | Redlands | 81.95 | 131.89 | 82 | Wabash Avenue | Westbound exit and eastbound entrance |
| San Bernardino | Yucaipa | 83.16 | 133.83 | 83 | Yucaipa Boulevard | |
| San Bernardino | Yucaipa | 84.69 | 136.30 | 85 | Oak Glen Road, Live Oak Canyon Road | |
| San Bernardino | Yucaipa | 85.63 | 137.81 | Wildwood Rest Area (eastbound only) | Wildwood Rest Area (eastbound only) | Wildwood Rest Area (eastbound only) |
| San Bernardino–Riverside county line | Yucaipa–Calimesa line | 86.84 | 139.76 | 87 | County Line Road | |
| Riverside | Calimesa | 87.68 | 141.11 | 88 | Calimesa Boulevard | Former US 99 north |
| Riverside | Calimesa | 88.74 | 142.81 | 89 | Singleton Road | Westbound exit and eastbound entrance |
| Riverside | Calimesa | 89.87 | 144.63 | 90 | Cherry Valley Boulevard – Cherry Valley | |
| Riverside | Calimesa | 90.88 | 146.26 | Brookside Rest Area (westbound only) | Brookside Rest Area (westbound only) | Brookside Rest Area (westbound only) |
| Riverside | Beaumont | 92.35 | 148.62 | 92 | Oak Valley Parkway | |
| Riverside | Beaumont | 93.49 | 150.46 | 93 | SR 60 west (Moreno Valley Freeway) – Riverside | Left exit westbound; no westbound entrance; former US 60 west |
| Riverside | Beaumont | 93.49 | 150.46 | 93 | 6th Street | Eastbound exit and westbound entrance; former US 60 east / US 99 south |
| Riverside | Beaumont | 94.39 | 151.91 | 94 | SR 79 south (Beaumont Avenue) | |
| Riverside | Beaumont | 95.03 | 152.94 | 95 | Pennsylvania Avenue | Westbound exit and eastbound entrance |
| Riverside | Beaumont–Banning line | 96.13 | 154.71 | 96 | Highland Springs Avenue | |
| Riverside | Banning | 98.15 | 157.96 | 98 | Sunset Avenue | |
| Riverside | Banning | 98.78 | 158.97 | 99 | 22nd Street – Downtown Banning | |
| Riverside | Banning | 99.67 | 160.40 | 100 | SR 243 south (8th Street) – Idyllwild | |
| Riverside | Banning | 100.68 | 162.03 | 101 | Hargrave Street – Idyllwild | |
| Riverside | Banning | 101.58 | 163.48 | 102 | Ramsey Street | Westbound exit and eastbound entrance; former US 60 west / US 99 north |
| Riverside | Banning–Cabazon line | 103.36 | 166.34 | 103 | Malki Road | Formerly Fields Road |
| Riverside | Cabazon | 104.48 | 168.14 | 104 | Morongo Trail – Cabazon | Former US 99 south; formerly Apache Trail |
| Riverside | Cabazon | 106.22 | 170.94 | 106 | Main Street – Cabazon | Former US 99 north |
| Riverside | ​ | 111.37 | 179.23 | 110 | Haugen–Lehmann Way | Formerly Verbena Avenue; formerly exit 111 |
| Riverside | Palm Springs | 112.02 | 180.28 | 111 | SR 111 south – Palm Springs | Eastbound exit and westbound entrance; formerly exit 112 |
| Riverside | Palm Springs | 113.07 | 181.97 | Whitewater Rest Area | Whitewater Rest Area | Whitewater Rest Area |
| Riverside | Palm Springs | 114.05 | 183.55 | 114 | Whitewater (Tipton Road, Whitewater Cutoff) | |
| Riverside | ​ | 116.51 | 187.50 | 117 | SR 62 east – Twentynine Palms, Yucca Valley | Signed as "29 Palms" |
| Riverside | Palm Springs–Desert Hot Springs line | 119.95 | 193.04 | 120 | Indian Canyon Drive – North Palm Springs | Formerly Indian Avenue |
| Riverside | Palm Springs–Desert Hot Springs line | 122.96 | 197.88 | 123 | Gene Autry Trail, Palm Drive – Desert Hot Springs | |
| Riverside | Cathedral City | 126.31 | 203.28 | 126 | Date Palm Drive | |
| Riverside | Cathedral City | 130.18 | 209.50 | 130 | Bob Hope Drive, Ramon Road – Palm Springs | |
| Riverside | Palm Desert | 131.33 | 211.36 | 131 | Monterey Avenue – Thousand Palms | |
| Riverside | Palm Desert | | | 133 | Portola Avenue | Proposed interchange |
| Riverside | Palm Desert | 133.71 | 215.19 | 134 | Cook Street | |
| Riverside | Palm Desert | 137.27 | 220.91 | 137 | Washington Street | |
| Riverside | Indio | 139.16 | 223.96 | 139 | Indio Boulevard, Jefferson Street | Indio Boulevard is former US 99 south / SR 86 south |
| Riverside | Indio | 141.56 | 227.82 | 142 | Monroe Street – Central Indio | |
| Riverside | Indio | 142.56 | 229.43 | 143 | Jackson Street | |
| Riverside | Indio | 143.77 | 231.38 | 144 | Golf Center Parkway to SR 111 | |
| Riverside | Indio | 144.65 | 232.79 | 145 | SR 86 south (Expressway) – Brawley, El Centro | Eastbound exit and westbound entrance; former SR 86S |
| Riverside | Coachella | 145.71 | 234.50 | 146 | Dillon Road to SR 86 south (Expressway) – Coachella | "To SR 86" not signed eastbound |
| Riverside | Coachella | | | 151 | Avenue 50 | Proposed interchange |
| Riverside | ​ | 158.82 | 255.60 | Cactus City Rest Area | Cactus City Rest Area | Cactus City Rest Area |
| Riverside | ​ | 161.94 | 260.62 | 162 | Frontage Road | |
| Riverside | ​ | 168.37 | 270.97 | 168 | Cottonwood Springs Road – Mecca, Twentynine Palms | Former SR 195 |
| Riverside | ​ | 172.89 | 278.24 | 173 | Summit Road – Chiriaco Summit | |
| Riverside | ​ | 176.94 | 284.76 | 177 | Hayfield Road | |
| Riverside | ​ | 181.87 | 292.69 | 182 | Red Cloud Road | |
| Riverside | ​ | 188.83 | 303.89 | 189 | Eagle Mountain Road | |
| Riverside | Desert Center | 191.92 | 308.87 | 192 | SR 177 north (Rice Road) – Desert Center | |
| Riverside | ​ | 201.22 | 323.83 | 201 | Corn Springs Road | |
| Riverside | ​ | 216.76 | 348.84 | 217 | Ford Dry Lake Road | |
| Riverside | ​ | 221.87 | 357.07 | 222 | Wiley's Well Road | |
| Riverside | ​ | 231.94 | 373.27 | 232 | Mesa Drive – Blythe Airport, Mesa Verde | Former US 60 east |
| Riverside | Blythe | 235.97 | 379.76 | 236 | SR 78 west (Neighbours Boulevard south) / I-10 BL east (Neighbours Boulevard north) – Brawley | |
| Riverside | Blythe | 238.97 | 384.58 | 239 | Lovekin Boulevard | |
| Riverside | Blythe | 239.98 | 386.21 | 240 | 7th Street | |
| Riverside | Blythe | 240.99 | 387.84 | 241 | US 95 north (Intake Boulevard) – Needles, Fairgrounds | Western end of US 95 overlap |
| Riverside | Blythe | | | 242 | E. Hobson Way (I-10 BL) | Westbound exit and entrance |
| Riverside | Blythe | 242.92 | 390.94 | 243 | Riviera Drive / I-10 BL west | Eastbound exit and entrance; westbound exit and entrance replaced by exit 242; I-10 Bus. is former US 60 west |
| Agricultural Inspection Station (westbound only) |||
| Colorado River | Colorado River | 243.31 | 391.57 | California–Arizona line | California–Arizona line | California–Arizona line |
| Colorado River | Colorado River | 243.31 | 391.57 | | I-10 east / US 95 south – Phoenix, Yuma | Continuation into Ehrenberg, Arizona |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Electronic toll collection Incomplete access Route transition |||||||
* 1 2 Exit number follows I-5 rather than I-10.

## Spur to US 101

The legislative definition of Route 10 includes a spur from I-5 (the Golden State Freeway) west to US 101 (the Santa Ana Freeway) near downtown Los Angeles. This section of roadway, the westernmost part of the San Bernardino Freeway, was in fact part of the original San Bernardino Freeway, carrying US 60/US 70/US 99 long before the Golden State Freeway opened. It was added to the Interstate Highway System by 1958 as I-110, but in 1968 it was removed from the system, becoming a Route 10 spur.
This road is signed only for the roads it feeds into: US 101 northbound and I-10 eastbound. It has only two interchanges between its ends: a westbound exit off the spur at Mission Road immediately before merging with US 101 northbound, and the eastbound exit for State Street and Soto Street before it merges onto I-10 eastbound—this one is numbered (as exit 19). There is no direct access from the I-10 spur to I-5.
Exit list The entire route is in Los Angeles, Los Angeles County.
| mi | km | Exit | Destinations | Notes |
| 0.0 | 0.0 | — | US 101 north (Santa Ana Freeway) | Western terminus of San Bernardino Freeway; no access to US 101 south; US 101 exit 1D |
| 0.1 | 0.16 | — | Mission Road | Westbound exit and eastbound entrance; also includes access from Pleasant Avenue and northbound US 101 (via exit 1D) onto entrance ramp |
| 0.6 | 0.97 | 19 | State Street to Soto Street | Eastbound exit and westbound entrance |
| 1.0 | 1.6 | — | I-10 east (San Bernardino Freeway east) | No access to I-10 west; freeway continues as I-10 east |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access Route transition |||||

## Related routes

There are three auxiliary Interstate Highways associated with I-10 in California:
* The Harbor Freeway between SR 47 in the San Pedro district of Los Angeles and I-10 near Downtown Los Angeles is designated as I-110. The rest of the highway, running along the historic Arroyo Seco Parkway to Pasadena, is instead designated as SR 110.
* The Foothill Freeway between I-5 in the Sylmar district of Los Angeles and SR 57 in Glendora is designated as I-210. The rest of the Foothill Freeway, between SR 57 and I-10 in Redlands, is instead designated as SR 210.
* The Long Beach Freeway between SR 47 in Long Beach and I-10 in Monterey Park is designated as I-710. Due to community opposition, a northern extension through South Pasadena was never constructed; the segment that was completed in Pasadena between California Boulevard and I-210 instead has the unsigned designation of SR 710.
One business loop of I-10 exists in California, running through Blythe in Riverside County.