# California county routes in zone A

There are 28 routes assigned to the "A" zone of the California Route Marker Program, which designates county routes in California. The "A" zone includes county highways in Lassen, Plumas, Shasta, Siskiyou, and Tehama counties.

## A1

County Route A1 (CR A1), more commonly known as Route of the Olympic Torch, is a 35.3-mile (56.8 km) county route in Lassen County, California, United States. It gained its name as a result of being used for a portion of the 1984 Summer Olympics torch relay.
County Route A1 runs from Route 36 near Susanville to Route 139 near Eagle Lake. It was originally named Eagle Lake Road.
This route still exists as a bypass from Susanville for north–south motorists, but it is no longer signed as such.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | SR 36 – Red Bluff, Susanville | Southern terminus |
| ​ | 14.2 | 22.9 | Gallatin Road | Former northern terminus |
| Spaulding | 27.1 | 43.6 | Lake View Drive | Only major road access to Spaulding |
| ​ | 35.3 | 56.8 | SR 139 – Susanville, Adin | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A2

County Route A2 (CR A2), known entirely as Susanville Road, is a county route in Lassen County, California, United States, connecting SR 299 to SR 139.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| Bieber | 0.0 | 0.0 | Tulelake, Klamath Falls (Bieber Lookout Road) | Continuation beyond SR 299 |
| Bieber | 0.0 | 0.0 | SR 299 – Alturas, Bieber, Mount Shasta, Redding | Western terminus |
| ​ | 1.4 | 2.3 | Valley Cutoff Road |
| ​ | 8.4 | 13.5 | Bassett Road |
| ​ | 11.4 | 18.3 | SR 139 – Susanville, Adin | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A3

County Route A3 (CR A3), or Standish–Buntingville Road, is a road in Lassen County, California, United States, connected to U.S. Route 395, and functions as a bypass for northbound traffic around Susanville. At its northern end it is signed for Reno (via US 395), and its southern end for Lakeview, also via US 395.
This route still serves as bypass for north–south 395 motorists, but is no longer signed as such.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | US 395 – Susanville, Reno | Southern terminus |
| Buntingville | 0.2 | 0.32 | Lakecrest Road |
| ​ | 2.2 | 3.5 | Sunnyside Road |
| ​ | 6.5 | 10.5 | Capezzoli Lane |
| Standish | 8.5 | 13.7 | US 395 – Alturas, Klamath Falls | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A5

County Route A5 (CR A5), or Bowman Road, is a road in Tehama County, California, United States, connecting SR 36 in Rosewood to I-5 in Cottonwood.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| Rosewood | 0.0 | 0.0 | SR 36 – Platina, Red Bluff | Western terminus |
| ​ | 11.3 | 18.2 | Evergreen Road, Plateau Drive | Trucks not advisable on Evergreen Road |
| ​ | 11.8 | 19.0 | Hooker Creek Road | Only major road access to Hooker |
| ​ | 14.3 | 23.0 | I-5 – Red Bluff, Redding | Interchange; eastern terminus; western terminus of CR A17; I-5 exit 662; former US 99 south |
| ​ | 14.3 | 23.0 | CR A17 (Main Street) / Lake California Drive – Cottonwood, Lake California | Continuation beyond I-5 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A6

County Route A6 (CR A6), or Manton Road, is a road in Tehama County, California, United States, connecting SR 36 in Dales to Forward Road in Manton.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| Dales | 0.0 | 0.0 | SR 36 – Red Bluff, Susanville | Western terminus |
| ​ | 8.8 | 14.2 | Wildcat Road |
| Manton | 15.6 | 25.1 | Forward Road, Manton Road – Shingletown | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A7

County Route A7 (CR A7) is a road in Tehama County, California, United States, connecting Ridge Road to SR 36 in Red Bluff. The route is known as Live Oak Road, Wilder Road, and Walnut Street.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | Live Oak Road, Ridge Road | Western terminus |
| ​ | 3.3 | 5.3 | Baker Road |
| Red Bluff | 3.5 | 5.6 | Paskenta Road |
| Red Bluff | 5 | 8.0 | SR 36 / I-5 BL (Main Street) | Eastern terminus; former US 99 |
| Red Bluff | 5 | 8.0 | Walnut Street | Continuation beyond SR 36 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A8

County Route A8 (CR A8) is a road in Tehama County, California, United States, connecting SR 99 in Los Molinos to SR 36 in Red Bluff. The route is known as Aramayo Way in Los Molinos, C Street and 5th Street in Tehama, San Benito Avenue, Road 99W or State Highway 99W (despite the old highway being a U.S. Route), and South Main Street and Main Street in Red Bluff.
The route between Proberta and Red Bluff follows the former U.S. Route 99W up to where it met up with former U.S. Route 99E (present day SR 36 / Antelope Boulevard), reuniting both with the former U.S. Route 99 (at the intersection of Main Street and Antelope Boulevard / Oak Street) in downtown Red Bluff.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| Los Molinos | 0.0 | 0.0 | SR 99 | Southern terminus; former US 99E |
| Tehama | 1.4 | 2.3 | CR A11 (5th Street) / Tehama Avenue – Corning | Eastern terminus of CR A11 |
| Proberta | 6.1 | 9.8 | State Highway 99W, Kindlespire Road | Former US 99W south |
| Proberta | 6.2 | 10.0 | Flores Avenue |
| Rawson | 10.7 | 17.2 | Riverside Avenue |
| Red Bluff | 12 | 19 | I-5 – Redding, Sacramento, San Francisco | Interchange; south end of I-5 BL overlap; I-5 north exit 647; south exit 647A |
| Red Bluff | 13.5 | 21.7 | SR 36 / I-5 BL north (Main Street, Antelope Boulevard) / Oak Street | Northern terminus; north end of I-5 BL overlap; Main Street is former US 99 north; Antelope Boulevard is former US 99E south |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## A9

County Route A9 (CR A9) is a road in Tehama County, California, United States, connecting Round Valley Road in Paskenta to SR 99 near Vina. The route is known as Paskenta Road, Corning Road, Solano Street in Corning, Hoag Road, Hall Road, and South Avenue.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| Paskenta | 0.0 | 0.0 | Round Valley Road | Western terminus |
| ​ | 0.6 | 0.97 | Lowrey Road |
| Flournoy | 6.6 | 10.6 | Paskenta Road |
| ​ | 18.7 | 30.1 | Rawson Road |
| Corning | 19.6 | 31.5 | I-5 – Sacramento, Redding | Interchange; I-5 exit 631 |
| Corning | 19.7 | 31.7 | Highway 99W, Edith Avenue | Former US 99W south |
| Corning | 20.7 | 33.3 | Third Street | Former US 99W north |
| ​ | 25.1 | 40.4 | South Avenue, Hall Road |
| Vina | 30.3 | 48.8 | SR 99 – Chico, Red Bluff | Eastern terminus; former US 99E |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A10

County Route A10 (CR A10), known locally as "Everitt Memorial Highway", is a 15.19-mile (24.4 km) long county road in Siskiyou County, California, United States, near Mount Shasta. It runs from Interstate 5 in the town of Mount Shasta City to a dead end at the 8,000-foot (2,400 m) level on 14,162-foot (4,317 m) Mount Shasta. The route follows Lake Street, Mount Shasta Boulevard, Alma Street, and Rockfellow Drive, right before reaching Everitt Memorial Highway.
The highway, completed in 1958 at a cost of $980,000 and designated in 1959, was originally built to provide access to the Mount Shasta Ski Bowl, which was destroyed by an avalanche in 1978. Today, the highway provides access to Mount Shasta for climbers, skiers, and anyone wanting access to the mountain.
In wintertime, the road is kept open only to the U.S.F.S. outpost at the 6,000-foot (1,800 m) level.
Major junctions The entire route is in Siskiyou County.
| Location | mi | km | Destinations | Notes |
| Mount Shasta | 0.0 | 0.0 | West Jessie Street, Hatchery Lane | Continuation beyond I-5 |
| Mount Shasta | 0.0 | 0.0 | I-5 – Weed, Dunsmuir | Interchange; western terminus; I-5 exit 738 |
| Mount Shasta | 0.5 | 0.80 | North Mount Shasta Boulevard south (I-5 BL south) / East Lake Street | West end of I-5 BL overlap; former US 99 south |
| Mount Shasta | 0.7 | 1.1 | North Mount Shasta Boulevard north (I-5 BL north) / West Alma Street | East end of I-5 BL overlap; former US 99 north |
| Mount Shasta | 1.1 | 1.8 | Rockfellow Drive west |
| Mount Shasta | 1.3 | 2.1 | North Washington Drive, Rockfellow Drive east |
| ​ | 15.2 | 24.5 | Old Ski Bowl Trailhead | Eastern terminus; dead end |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## A11

County Route A11 (CR A11) is a county route in Tehama County, California, United States, connecting Interstate 5 at exit 636 with CR A8 in Tehama. The route is mostly known as Gyle Road, while most of the portion within the city of Tehama is known as 5th Street.
Major junctions The entire route is in Tehama County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | Gyle Road – Rancho Tehama | Continuation beyond I-5 |
| ​ | 0.0 | 0.0 | I-5 – Sacramento, Redding | Interchange; western terminus; I-5 exit 636 |
| ​ | 0.3 | 0.48 | Truckee Avenue |
| ​ | 1.8 | 2.9 | State Highway 99W | Former US 99W |
| ​ | 4.2 | 6.8 | Hall Road |
| Tehama | 5.2 | 8.4 | CR A8 (C Street, 5th Street) / Tehama Avenue – Los Molinos, Gerber | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A12

County Route A12 (CR A12), known locally as the "99-97 Cutoff", or more commonly, "the 97 cutoff", is a two-lane rural highway in Siskiyou County, California, United States, with a length of 17.9 miles (28.8 km). A12 begins in the west at its junction with Old 99 Highway, which was once US 99. Just a few dozen yards to the east, it intersects Interstate 5. Its eastern terminus is at US 97, 12 miles (19 km) north of Weed.
One mile east of the Interstate junction, it passes through the tiny village of Grenada, the only population center of any merit along the route. 7 miles (11 km) further east is the burg Mayten, which consists only of a convenience store, a church, and an elementary school.
The route is heavily used by travelers and truckers southbound on Interstate 5 who wish to use US 97 northbound en route to Klamath Falls and points north. This route saves over 13 miles (21 km) than if the alternative routing via I-5 to Weed, then north on US 97 was used. Hence, the local name "97 cutoff".
The western two-thirds of the route passes through agricultural areas, and is very reminiscent of two-lane farm roads in California's Central Valley. However, the eastern portion is very scenic, passing through an area with towering dark red crags and buttes to the north.
Major junctions The entire route is in Siskiyou County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | 99-97 Cutoff to Old Highway 99 – Yreka, Gazelle | Continuation beyond I-5; connects to former US 99 |
| Grenada | 0.0 | 0.0 | I-5 – Redding, Portland | Interchange; western terminus; I-5 exit 766 |
| Grenada | 0.8 | 1.3 | CR A28 (Montague Grenada Road) – Montague | Southern terminus of CR A28 |
| ​ | 7.6 | 12.2 | CR A29 (Big Springs Road) – Lake Shastina, Weed, Little Shasta | Northern terminus of CR A29; only major road access to Big Springs |
| ​ | 13.6 | 21.9 | Harry Cash Road – Little Shasta |
| ​ | 18 | 29 | US 97 – Weed, Dorris | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A13

County Route A13 (CR A13), known entirely as Walker Memorial Road, is a road in Plumas County, California, United States, connecting SR 36 to SR 147.
Major junctions The entire route is in Plumas County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | Road 322 | Continuation beyond SR 36 |
| ​ | 0.0 | 0.0 | SR 36 – Susanville, Chester | Western terminus |
| Lake Almanor Peninsula | 1.4 | 2.3 | Foxwood Drive | Only major road access to Lake Almanor Peninsula |
| Hamilton Branch | 3.8 | 6.1 | SR 147 – Greenville, Westwood | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A14

County Route A14 (CR A14), or Graeagle Johnsville Road, is a road in Plumas County, California, United States, connecting SR 89 in Graeagle to Main Street in Johnsville.
Major junctions The entire route is in Plumas County.
| Location | mi | km | Destinations | Notes |
| Johnsville | 0.0 | 0.0 | Main Street | Western terminus; only major road access to Johnsville |
| Plumas Eureka | 3.7 | 6.0 | Poplar Valley Road | Only major road access to Plumas Eureka |
| Mohawk | 4.3 | 6.9 | Mohawk Highway Road |
| Graeagle | 5.7 | 9.2 | SR 89 – Truckee, Quincy | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A15

County Route A15 (CR A15), or Portola McLears Road for most of the route, is a road in Plumas County, California, United States, connecting SR 89 in Valley Ranch to SR 70 in Portola. On its northern end, after passing through the Old Town commercial district of Portola, A15 passes the Western Pacific Railroad Museum.
Major junctions The entire route is in Plumas County.
| Location | mi | km | Destinations | Notes |
| Valley Ranch | 0.0 | 0.0 | SR 89 | Southern terminus |
| Gold Mountain | 3.7 | 6.0 | Bear Run Road, Village Trail Road |
| Portola | 7.8 | 12.6 | Main Street |
| Portola | 8.2 | 13.2 | South Gulling Street |
| Portola | 8.4 | 13.5 | SR 70 (East Sierra Avenue, West Sierra Avenue) | Northern terminus |
| Portola | 8.4 | 13.5 | Gulling Street | Continuation beyond SR 70 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A16

County Route A16 (CR A16) is a county route in Shasta County, California, United States, connecting SR 36 in Platina to SR 273 in Redding. The route is known as Platina Road, Placer Road, and Placer Street in Redding.
Known locally as "Ditch Grade Road"; the final 6.5-mile (10.5 km) section before the junction with SR 36 closely follows the contour of hillside as this route was previously used to bring water to the mine at Platina. There is a rock formation some 6.5 miles (10.5 km) from SR 36 known as Old Man Rock or The Lincoln Memorial.
Major junctions The entire route is in Shasta County.
| Location | mi | km | Destinations | Notes |
| Platina | 0.0 | 0.0 | Beegum George Road | Continuation beyond SR 36; unpaved road |
| Platina | 0.0 | 0.0 | SR 36 – Platina, Red Bluff | Western terminus |
| Igo | 26.6 | 42.8 | Clear Creek Road, Gas Point Road to SR 273 – Gas Point |
| Igo | 28 | 45 | Cloverdale Road – Olinda, Anderson |
| Centerville | 31.5 | 50.7 | Texas Springs Road |
| Redding | 37 | 60 | Buenaventura Boulevard |
| Redding | 38.6 | 62.1 | SR 273 south (California Street) | One-way southbound |
| Redding | 38.7 | 62.3 | SR 273 north (Pine Street) | Eastern terminus; one-way northbound |
| Redding | 38.7 | 62.3 | Placer Street | Continuation beyond SR 273 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A17

County Route A17 (CR A17) is a county route in Shasta and Tehama counties in the U.S. state of California, connecting Interstate 5 near Cottonwood to SR 44 near Inwood. The route is known as Balls Ferry Road, Ash Creek Road, and Dersch Road. In Cottonwood, the route follows Main Street, Front Street, Magnolia Street, Chestnut Street, and First Street.
Major junctions
| County | Location | mi | km | Destinations | Notes |
| Tehama | ​ | 0.0 | 0.0 | CR A5 (Bowman Road) | Continuation beyond I-5 |
| Tehama | ​ | 0.0 | 0.0 | I-5 – Red Bluff, Redding | Interchange; western terminus; eastern terminus of CR A5; I-5 exit 662; former US 99 south |
| Tehama | ​ | 0.0 | 0.0 | Lake California Drive – Lake California | |
| Shasta | Cottonwood | 1.2 | 1.9 | Main Street | Former US 99 north |
| Shasta | ​ | 3.8 | 6.1 | Panorama Point Road |
| Shasta | ​ | 5.8 | 9.3 | Balls Ferry Road |
| Shasta | ​ | 7.1 | 11.4 | Gover Road |
| Shasta | ​ | 15.8 | 25.4 | Dersch Road |
| Shasta | Shingletown | 19.2 | 30.9 | SR 44 | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## A18

County Route A18 (CR A18), or Lake Boulevard, is a road in Shasta County, California, United States, on the State Scenic Highway System connecting SR 273 (as well as Interstate 5 and SR 299) in Redding to Shasta Dam.
Major junctions The entire route is in Shasta County.
| Location | mi | km | Destinations | Notes |
| Redding | 0.0 | 0.0 | SR 299 east (Lake Boulevard) | Continuation beyond SR 273 |
| Redding | 0.0 | 0.0 | SR 273 / SR 299 west (North Market Street) | Southern terminus; former US 99 |
| Redding | 2 | 3.2 | Oasis Road |
| Shasta Lake | 4.6 | 7.4 | Pine Grove Avenue, Walker Mine Road |
| Shasta Lake | 6.7 | 10.8 | SR 151 (Shasta Dam Boulevard) to I-5 – Shasta Dam |
| ​ | 8.8 | 14.2 | SR 151 east (Shasta Dam Boulevard) / Shasta Dam Access Road | Roundabout; northern terminus; western terminus of SR 151; Shasta Dam Access Road is restricted to dam personnel |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A19

County Route A19 (CR A19), or McArthur Road, is a county route in Shasta County, California, United States, connecting SR 299 to SR 89.
Major junctions The entire route is in Shasta County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | SR 89 – McCloud, Burney Falls, Lassen Park | Western terminus |
| Dana | 4.6 | 7.4 | Ted Elder Road |
| ​ | 10.6 | 17.1 | Island Road |
| Glenburn | 11.9 | 19.2 | CR A20 (Glenburn Road) | Northern terminus of CR A20 |
| McArthur | 17.4 | 28.0 | SR 299 – Redding, Alturas | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A20

County Route A20 (CR A20), or Glenburn Road, is a county route in Shasta County, California, United States, connecting SR 89 to CR A19 (McArthur Road).
Major junctions The entire route is in Shasta County.
| Location | mi | km | Destinations | Notes |
| Fall River Mills | 0.0 | 0.0 | Bridge Street | Continuation beyond SR 299 |
| Fall River Mills | 0.0 | 0.0 | SR 299 – Redding, Alturas | Southern terminus |
| ​ | 3.6 | 5.8 | Gomez Road | Only major road access to Gomez |
| Glenburn | 5.5 | 8.9 | Brown Road |
| Glenburn | 5.6 | 9.0 | CR A19 (McArthur Road) to SR 89 – McCloud | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A21

County Route A21 (CR A21) is a county route in Lassen County, California, United States, connecting SR 147 to SR 44, intersecting SR 36 along the way. The route is known as 3rd Street and Ash Street in Westwood and Mooney Road for the remainder of the route.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| Clear Creek | 0.0 | 0.0 | SR 147 – Chester, Red Bluff, Greenville, Quincy | Southern terminus |
| Westwood | 3.5 | 5.6 | SR 36 – Susanville, Chester | |
| ​ | 22.6 | 36.4 | SR 44 – Susanville, Redding | Northern terminus |
| ​ | 22.6 | 36.4 | FH 21 – Antelope Lookout, Champs Flat, Eagle Lake | Continuation beyond SR 44; unpaved road |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A22

County Route A22 (CR A22) is a county route in Plumas County, California, United States, connecting SR 89 in Crescent Mills to Taylorsville. The route is mostly known as Arlington Road, along with a small section of Main Street in Taylorsville.
Major junctions The entire route is in Plumas County.
| Location | mi | km | Destinations | Notes |
| Crescent Mills | 0.0 | 0.0 | SR 89 – Quincy, Greenville | Western terminus |
| ​ | 1.7 | 2.7 | Emigrant Road |
| Taylorsville | 4.5 | 7.2 | Main Street, Nelson Street | Eastern terminus; only major road access to Taylorsville |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A23

County Route A23 (CR A23) is a county route in Plumas and Sierra counties in the U.S. state of California, connecting SR 49 / SR 89 near Sattley to SR 70 near Beckwourth passing through the Sierra Valley on its west side. In the northerly direction, CR A23 begins at the junction of SR 49 / SR 89 at Sattley, formerly known as Church's Corners, which is a census-designated place in Sierra County. The road leaves Sattley as Westside Road. It passes near Calpine, a census-designated place also in Sierra County, where the road becomes Beckwourth-Calpine Road and continues to SR 70 near Beckwourth, a census-designated place in Plumas County.
Major junctions
| County | Location | mi | km | Destinations | Notes |
| Sierra | Calpine | 0.0 | 0.0 | SR 49 / SR 89 – Downieville, Quincy, Truckee | Southern terminus |
| Sierra | ​ | 3.7 | 6.0 | Calpine Road – Calpine |
| Plumas | Beckwourth | 12.8 | 20.6 | SR 70 – Beckwourth, Portola | Northern terminus |
| Plumas | Beckwourth | 12.8 | 20.6 | Road 125 | Continuation beyond SR 70 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## A24

County Route A24 (CR A24) is a county route in Plumas and Sierra counties in the U.S. state of California, connecting SR 49 in Loyalton to SR 70 in Hawley. The route is known as 3rd Street and Beckwith Street in Loyalton, Beckwith Road, Sierra Valley Road, Dyson Lane, and Beckworth Loyalton Road.
Major junctions
| County | Location | mi | km | Destinations | Notes |
| Sierra | Loyalton | 0.0 | 0.0 | 3rd Street | Continuation beyond SR 49 |
| Sierra | Loyalton | 0.0 | 0.0 | SR 49 | Southern terminus |
| Plumas | ​ | 6.3 | 10.1 | Dyson Lane east | Connects to SR 49 |
| Plumas | Hawley | 15.4 | 24.8 | SR 70 | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## A25

County Route A25 (CR A25), or Herlong Access Road, is a short highway in Lassen County, California, United States. Paired with CR A26, it services Herlong and the Sierra Army Depot.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| Herlong Junction | 0.0 | 0.0 | US 395 | Western terminus |
| ​ | 3.2 | 5.1 | Honey Lake Road | Only major road access to Herlong Airport-H37 |
| Patton Village | 4.2 | 6.8 | Pole Line Road | Eastern terminus |
| Patton Village | 4.2 | 6.8 | Herlong Access Road | Continuation beyond Pole Line Road |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A26

County Route A26 (CR A26), or Garnier Road, is a short highway in Lassen County, California, United States. Paired with CR A25, it services Herlong and the Sierra Army Depot.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | US 395 | Southern terminus |
| ​ | 2.7 | 4.3 | Herlong Landfill Road |
| Patton Village | 3.8 | 6.1 | Herlong Access Road | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A27

County Route A27 (CR A27) is a county route in Lassen County, California, United States, connecting SR 36 in Susanville to US 395 in Litchfield, passing by the High Desert State Prison. The route is known as East Riverside Drive in Susanville, Johnstonville Road, and Center Road.
Major junctions The entire route is in Lassen County.
| Location | mi | km | Destinations | Notes |
| Susanville | 0.0 | 0.0 | SR 36 | Western terminus |
| Susanville | 0.5 | 0.80 | Skyline Road |
| Johnstonville | 3.8 | 6.1 | Johnstonville Road – Johnstonville |
| Leavitt | 6.2 | 10.0 | Rice Canyon Road | Serves High Desert State Prison |
| ​ | 10.2 | 16.4 | Belfast Road | Only major road access to Belfast |
| Litchfield | 13.2 | 21.2 | Cut Off Road |
| Litchfield | 15 | 24 | US 395 – Reno | Eastern terminus; right turn to Reno (US 395 south) is via Market Street |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## A28

County Route A28 (CR A28) is a two-lane rural highway in Siskiyou County, California, United States, connecting CR A12 (the 99-97 Cutoff) to Copco Road near Hornbrook. The route is known as Montague Grenada Road, 11th Street in Montague, and Ager Road.
CR A28 begins at CR A12 in Grenada, connecting Grenada with Interstate 5 near Hornbrook via Montague. It is a flat, level route, and for this reason, was the original preferred routing for both US 99 and I-5 through the area. In both instances, the routing was changed because of intense lobbying by officials in Yreka, who decried the fact that the major highway through the county would bypass the county seat. Thus, both highways ended up being built over far more rigorous terrain at a huge cost increase.
A28 serves the aforementioned three towns, as well as numerous homes and ranches along the way.
Major junctions The entire route is in Siskiyou County.
| Location | mi | km | Destinations | Notes |
| Grenada | 0.0 | 0.0 | CR A12 (99-97 Cutoff) – Weed, Big Springs, Klamath Falls | Southern terminus |
| ​ | 4.3 | 6.9 | Oberlin Road, Breceda Lane – Yreka |
| Montague | 5.7 | 9.2 | SR 3 south (Montague Road) – Yreka | South end of SR 3 overlap |
| Montague | 6 | 9.7 | SR 3 north (East Webb Street) / West Webb Street | North end of SR 3 overlap |
| ​ | 9 | 14 | Yreka Ager Road, Shelley Road – Yreka | Serves Siskiyou County Airport |
| ​ | 15.3 | 24.6 | York Road |
| Ager | 16.6 | 26.7 | Ager Beswick Road – Copco Lake |
| ​ | 20.10 | 32.35 | Copco Road (Juniper Road) – Hornbrook, Iron Gate Lake | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## A29

County Route A29 (CR A29), or Big Springs Road, is a county route in Siskiyou County, California, United States. It connects US 97 to CR A12 (the 99-97 Cutoff), passing through the census-designated place of Lake Shastina and the unincorporated community of Big Springs.
Major junctions The entire route is in Siskiyou County.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | US 97 – Weed, Dorris | Southern terminus |
| Lake Shastina | 1.7 | 2.7 | Jackson Ranch Road | Only major road access to Lake Shastina |
| Big Springs | 9.5 | 15.3 | East Louie Road |
| ​ | 11.6 | 18.7 | CR A12 (99-97 Cutoff) | Northern terminus |
| ​ | 11.6 | 18.7 | Big Springs Road | Continuation beyond CR A12 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||