# List of tunnels in California

The following is a list of tunnels in California.

## Rail
### Mass transit

* Altamont Corridor Express
** (two) Union Pacific Railroad (formerly Western Pacific Railroad) in Niles Canyon, Alameda County: one 4,500 feet (1,400 m) long and the other 450 feet (140 m) long
* BART
** Balboa Park station complex
** Berkeley Hills Tunnel, rapid transit tunnel, BART beneath Grizzly Peak between Orinda and Oakland
** Berkeley Subway, beneath Berkeley
** Broadway Subway in Oakland, including the Oakland Wye
** Fremont Central Park Subway, underneath Lake Elizabeth
** Market Street subway twin level rapid transit and light rail tunnel beneath Market Street in San Francisco (shared with Muni Metro)
** Milpitas station
** Lundy/Sierra tunnel
** Silicon Valley BART extension Phase 3 (planned)
** Transbay Tube, rapid transit tunnel, BART beneath San Francisco Bay between Oakland and San Francisco
** San Francisco International Airport extension
* Caltrain
** (five) Bayshore Cutoff, originally built by the Southern Pacific railroad, tunnel 5 abandoned in 1956
** The Portal (proposed)
*** Salesforce Transit Center train box
* Los Angeles Metro Rail
** (three) K Line (under construction)
** Figueroa Tunnel, on the E Line
** Flower Street tunnel, carrying the A and E Lines to the 7th Street/Metro Center station
** L Line subway, between Indiana and Pico/Aliso stations
** Los Angeles Subway, including the B Line and D Line
** Regional Connector
* Metrolink
** San Fernando Tunnel, rail tunnel, Union Pacific Railroad (formerly Southern Pacific Railroad), Santa Clarita
** (three) Simi Valley Tunnels/Santa Susana Tunnels, rail tunnels, Union Pacific Railroad (formerly Southern Pacific Railroad), between Los Angeles and Simi Valley through the Santa Susana Mountains; the longest and westernmost is Tunnel No. 26
* San Francisco Municipal Railway (Muni Metro)
** Central Subway
** Sunset Tunnel, light rail tunnel beneath Buena Vista Park
** Twin Peaks Tunnel, light rail tunnel beneath Twin Peaks
** Market Street subway twin level rapid transit and light rail tunnel beneath Market Street in San Francisco (shared with BART)
* Sonoma–Marin Area Rail Transit
** Cal Park Hill Tunnel, beneath California Park, also features a pedestrian/bicycle path
** Puerto Suello Hill Tunnel, commuter rail tunnel
* SDSU Transit Center, the only subway station in the San Diego Trolley system
* VTA light rail tunnel under San Jose Diridon station

#### Abandoned

* Belmont Tunnel/Toluca Substation and Yard
* (five) North Pacific Coast Railroad tunnels, including:
** Alto Tunnel
* Tunnel 8, former Northwestern Pacific Railroad tunnel
* Shepherd Canyon, used by the Sacramento Northern Railway
* (five) Wrights, Laurel, Zayante, Tunnel 5, and Mountain Charlie Tunnels; built by the South Pacific Coast Railroad (Tunnel 7 daylighted c. 1950s)

### Freight and intercity rail

* Fort Mason Tunnel, former rail tunnel beneath Fort Mason, San Francisco
* Point Richmond Tunnel, carrying BNSF freight parallel to the road tunnel in Point Richmond
* Summit Tunnel (Tunnel No. 6), abandoned rail tunnel, Central Pacific Railroad, one of a number through the Donner Pass area of the Sierra Nevada
* The Big Hole, Tunnel No. 41, built to replace Tunnel No. 6 through the Donner Pass and carrying the Union Pacific Railroad
* (34) Feather River Route, including:
** Chilcoot Tunnel
** Spring Garden Tunnel
** Keddie Wye, tunnels Tunnel No. 31 and No. 32 in the wye complex
* Mission Tunnel, below Mission Santa Cruz and used by the Santa Cruz, Big Trees and Pacific Railway
* (three) BNSF Gateway Subdivision
* (three) BNSF Stockton Subdivision, including:
** Franklin Tunnel
* (six) Union Pacific Coast Subdivision
** Tunnel No. 6 (Coast Line)
* Tehachapi Loop Tunnel, rail tunnel, 1876, Union Pacific Railroad (formerly, Southern Pacific Railroad), just north of State Route 58 between Tehachapi and Bakersfield

### Excursion

* (two) California Western Railroad, popularly called the Skunk Train

## Automotive

* Collier Tunnel, Redwood Highway (US 199), Del Norte County
* Dornan Tunnel, carrying Gerrard Avenue in Point Richmond parallel to the rail tunnel
* Escondido Freeway (SR 15), cut-and-cover tunnel between Polk and Orange Avenues in East San Diego (Teralta Park covers the freeway)
* Feather River Highway (SR-70), three tunnels, Feather River Canyon
* Gaviota Tunnel, northbound US 101, Santa Barbara County
* Harry Crabb Tunnel, ramp to eastbound Interstate 80 (Alan S. Hart Freeway) from northbound Sunrise Avenue (south of Douglas Boulevard) in Roseville
* John F. Foran Freeway (I-280), (southbound only) at its interchange with the 19th Avenue (SR 1) in Daly City
* Lighthouse Avenue Tunnel, Monterey
* Tom Lantos Tunnels/Devil's Slide Tunnels, twin tunnels, SR 1 beneath Devil's Slide between Pacifica and Montara
* Tunnels to Nowhere, two tunnels, Shoemaker Canyon Road (unpaved), San Gabriel Mountains
* Big Oak Flat Road, three tunnels, Yosemite National Park
* Wawona Tunnel, Wawona Road (SR 41), Yosemite National Park, the longest road tunnel in California at 4,233 feet (1,290 m)

### Alameda County

* 11th Street Tunnel, under the Oakland Museum of California in Oakland
* Caldecott Tunnel, quad tunnels, SR 24 beneath Grizzly Peak between Orinda and Oakland
* Northbrae Tunnel, former East Bay Electric Lines rail tunnel, current road tunnel joining Solano Avenue and Sutter Street beneath Marin Circle, Berkeley
* Posey and Webster Street Tubes, twin immersed tubes, SR 61 beneath the Oakland Estuary between Alameda and Oakland

### Los Angeles County

* Airport Tunnel, twin tunnels, Sepulveda Boulevard (SR 1) beneath Runways 7L/25R and 7R/25L at Los Angeles International Airport, Los Angeles
* Angeles Crest Highway (State Route 2), two sets of tunnels in the San Gabriel Mountains National Monument northeast Los Angeles County between La Cañada Flintridge and Wrightwood
* Angeles Forest Highway Tunnel/Singing Springs Tunnel/Hidden Springs Tunnel, Angeles Forest Highway/County Road N3, San Gabriel Mountains National Monument, north Los Angeles County between La Cañada Flintridge and Palmdale
* Broadway Tunnel extended Broadway further north, later demolished
* Kanan Dume Tunnel, north of Malibu
* Malibu Canyon Tunnel
* Figueroa Street Tunnels, northbound Arroyo Seco Parkway (SR 110), four tunnels beneath Elysian Park, Los Angeles
* Foothill Freeway (I-210)
** Cut-and-cover tunnel between Glendale Freeway and Angeles Crest Highway (both part of State Highway 2) in La Cañada Flintridge (Memorial Park covers the freeway)
** Two short tunnels (eastbound only) under SR 710 and Ventura Freeway (SR 134) in Pasadena
* Griffith Park Tunnel, Vermont Canyon Road/Mount Hollywood Drive in Griffith Park, Los Angeles
* Long Beach Airport tunnels, two sets of twin tunnels for Lakewood Boulevard (SR 19) and Spring Street under runway 12/30 at Long Beach Airport, Long Beach
* McClure Tunnel, SR 1 located at the western terminus of I-10 in Santa Monica
* Mount Baldy Road, two tunnels, north of Claremont
* Newhall Pass Tunnels, two tunnels about 550 feet (170 m) each, southbound truck bypass lanes of the Golden State Freeway (I‑5), in Santa Clarita and Los Angeles
* Orange Freeway (SR 57), (northbound only) at its interchange with the Pomona Freeway (SR 60) in Diamond Bar
* Santa Ana Freeway portion of US 101 (northbound only), at its interchange with the San Bernardino Freeway (SR 10) in downtown Los Angeles
* Second Street Tunnel, beneath Bunker Hill, downtown Los Angeles
* Third Street Tunnel, beneath Bunker Hill, downtown Los Angeles
* Sepulveda Boulevard Tunnel, Sepulveda Boulevard under Mulholland Drive at the north end of Sepulveda Pass, Los Angeles
* Van Nuys Airport Tunnel, twin tunnels, Sherman Way under runway 16R/34L at Van Nuys Airport, west San Fernando Valley, Los Angeles

### Marin County

* Baker-Barry Tunnel, single lane tunnel, Bunker Rd, Sausalito
* Robin Williams Tunnel/Waldo Tunnel, twin tunnels, US 101 and SR 1, Sausalito

### Orange County

* Main Street under the Santa Ana Freeway (I‑5) in Tustin, California
* SR 133 segment of the Eastern Transportation Corridor toll road, (northbound only) at its interchange with the SR 241 (Foothill Transportation Corridor) in Irvine
* SR 261 segment of the Eastern Transportation Corridor toll road, (northbound only) at its interchange with the SR 241 (Eastern Transportation Corridor) in Orange

### San Francisco

* Broadway Tunnel, twin tunnels, Broadway beneath Russian Hill
* MacArthur Tunnel, SR 1 beneath the Presidio of San Francisco (Golden Gate National Recreation Area)
* Masonic Tunnel, carrying Geary Boulevard under Masonic Avenue
* Presidio Parkway, US 101 through the Presidio of San Francisco (replacement for the elevated Doyle Drive)
* Stockton Street Tunnel, beneath a portion of Chinatown
* Yerba Buena Tunnel, twin tunnels, I-80 near the middle of the San Francisco–Oakland Bay Bridge complex, Yerba Buena Island

### Abandoned

* Kennedy Tunnel, former road above the extant Caldecott Tunnel (see above)

## Utility

* Angeles Tunnel
* Claremont Tunnel
* Hetch Hetchy Coast Range tunnel
* (three) Inland Feeder
** Arrowhead West Tunnel
** Arrowhead East Tunnel
** Riverside Badlands Tunnel
* Mile Rock
* San Jacinto Tunnel
* South Bay Aqueduct
* Trinity Diversion Tunnel: a 10.7 mile tunnel diverting water from the Trinity Basin to the Sacramento Valley.

## Mining

* Burro Schmidt Tunnel, mining tunnel, east of Red Rock Canyon State Park, eastern Kern County

## Military and Industry

* SpaceX constructed a 1.4 Mile test tunnel underneath the parking lot of its Hawthorne plant for experimental transportation technology.
* United States Airforce Plant 42 in Palmdale is rumored to have an underground network of tunnels connecting to nearby defense plants including Lockheed's Skunk works.
* Ft. McArthur Tunnel Complex: an abandoned World War II network connecting fortifications in San Pedro, CA.
* The Lawson Adit is a tunnel constructed underneath UC Berkeley into the Berkeley Hills in the early 1900s for student mining research.
* US Dept. of Defense Tunnel Warfare Center, China Lake
* The Stanford Linear Accelerator operates in a 10,000-foot concrete tunnel, 25 feet underground.
* Vandenberg Space Force Base has a number of underground tunnels to support rocket launch operations.