California "S" County Routes - S-24 to S-80


A uniform numbering system has been adopted to uniquely identify county routes across the state of California. Within this system, each route designation has a letter and number combination. The first digit is a letter, and the second and third digits are numbers. The lower letters are generally to the north of the state, and the higher numbers are generally located in the southern part of the state. The lowest route is Lassen County A-1, and the highest route is Imperial County S-80.

County Route Group S -- along with Groups N, P, and R -- are in the Southern California group of counties: Imperial, Inyo, Los Angeles, Mono, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura. The letters O and Q are omitted, and county routes in Group P have not been assigned.

Index to "S" Series County Routes:

Imperial County S-24 north and Business Loop I-8/Winterhaven Drive north
Imperial County S-24/Picacho Road north
Leaving the Business Loop I-8 four-way stop sign intersection just east of downtown Winterhaven, Imperial County S-24 travels east briefly on Picacho Road. The county highway will transition onto several local roads as it makes its way to Bard and ultimately the Imperial Dam. Photo taken 01/15/07.
A mileage sign posted shortly thereafter provides the distance to Bard (four miles), Laguna Dam (13 miles), and Imperial Dam (15 miles). At Imperial Dam, Imperial County S-24 crosses the Colorado River and becomes Imperial Dam Road in Arizona, with no numerical designation. Photo taken 01/15/07.
Shortly thereafter, Imperial County S-24/Picacho Road crosses the Yuma Main Canal, which brings water from All American Canal to Yuma. The old bridge likely dates to the 1930s. Photos taken 01/15/07.
After crossing the Yuma Main Canal, Imperial County S-24 and Picacho Road turn north. Continue straight ahead to the Quechan Indian Reservation casino and the Ocean-to-Ocean Highway Bridge, which carried Old U.S. 80 over the Colorado River. Photo taken 01/15/07.
Immediately after making the turn, the county road dives under the Union Pacific Railroad via this subway. Photo taken 01/15/07.

Another Yuma Project sign is posted after the railroad subway. Imperial County S-24 enters the Quechan (or Fort Yuma) Indian Reservation, which features the casino at the south end of the reservation but also has a strong agricultural presence. Much of Imperial County S-24 over the next several miles to Bard will feature farming landscape, all made possible by irrigated water. Photo taken 01/15/07.
Imperial County S-24 makes one of its many turns at this towering tree. Photo taken 01/15/07.
A reassurance shield for Imperial County S-24 is posted along northbound Picacho Road. Note the farms located on both sides of the highway. Photo taken 01/15/07.
A towering palm tree sways in the winter winds as Picacho Road approaches Indian Rock Road in the Quechan Indian Reservation. Several of these intersecting roads are signed as Indian Roads, complete with black and white arrowhead shield. Photo taken 01/15/07.
Northbound Imperial County S-24/Picacho Road meets Indian Rock Road at this interchange. A high voltage transmission line passes overhead. Photo taken 01/15/07.
Picacho Road and Imperial County S-24 divide ahead. Picacho Road continues due north into the desert, eventually connecting with Picacho State Recreation Area along the Colorado River via miles of unpaved road. Imperial County S-24, meanwhile, makes a hard turn to the east along Ross Road. Photo taken 01/15/07.
A trailblazer for the continuation of Imperial County S-24 is posted on northbound Picacho Road at the intersection with Ross Road. Photo taken 01/15/07.
Imperial County S-24/Ross Road north
An old bridge carries Imperial County S-24/Ross Road over an irrigation canal. Photo taken 01/15/07.
At Perez Road, another Imperial County S-24 reassurance shield is posted. The county road continues east for another couple of miles to Bard. Photo taken 01/15/07.
The county route is well signed along Ross Road. Photo taken 01/15/07.
Near a palm farm, Imperial County S-24 turns north from Ross Road onto Bard Road. The town of Bard is located just north of here. Photo taken 01/15/07.
Imperial County S-24/Bard Road north
Now traveling north again, Imperial County S-24/Bard Road approaches the small town of Bard. The Little Picacho Peak Wilderness lies ahead. Photo taken 01/15/07.
Hay bales line the east side of Bard Road as Imperial County S-24 enters Bard. A few houses line both sides of the highway. Photo taken 01/15/07.
Imperial County S-24 prepares to turn from Bard Road onto Colby Road heading east again. This is another in a series of sharp turns along this county road. Photo taken 01/15/07.
Imperial County S-24 north and Colby Road east
For a short distance, Imperial County S-24 follows Colby Road east. The next 90-degree turn can be seen ahead near the palm tree farms. Photo taken 01/15/07.
At this turn, Imperial County S-24 turns from eastbound Colby Road to northbound York Road. Photo taken 01/15/07.
Imperial County S-24/York Road north
Again traveling north, Imperial County S-24 follows York Road through more agricultural areas. Photo taken 01/15/07.
A reassurance shield is posted near the "Cloud Museum." Photo taken 01/15/07.
York Road approaches Mehring Road, where Imperial County S-24 turns east again. Photo taken 01/15/07.
Imperial County S-24 north and Mehring Road east
Imperial County S-24 now travels due east along Mehring Road toward the Colorado River. Photo taken 01/15/07.
Another reassurance shield is posted shortly thereafter. Mehring Road skirts the edge of the irrigated area, and the desert looms on the north side of the road. Photo taken 01/15/07.
A few bridges carry Mehring Road over washes and irrigation ditches. Ahead is the 500kV Southwest Powerlink, which carries power across southern California and Arizona. Photo taken 01/15/07.
Imperial County S-24/Imperial Road north
Upon reaching the Colorado River, Imperial County S-24 turns north again on Imperial Road. Photo taken 01/15/07.
The Laguna Dam is located ahead. There are no facilities here. Photo taken 01/15/07.
Next to the Laguna Dam is the only known saguaro cactus in California. (Just kidding, but there are not many of them in California!) Photo taken 01/15/07.
Continuing north, Imperial County S-24 passes through riparian, desert vegetation on its way north between Laguna Dam and Imperial Dam. Photo taken 01/15/07.
Northbound Imperial County S-24/Imperial Road approaches Senator Wash Road. Use Senator Wash Road north to Senator Wash and Squaw Lake recreational areas on Imperial Reservoir. Turn left ahead to Imperial Dam as well. Continue straight ahead to follow Imperial County S-24 northeast into Arizona. Photo taken 01/15/07.
Imperial County S-24 turns northeast toward Arizona at this point. Photo taken 01/15/07.
Continuing east, Imperial County S-24/Imperial Road crosses over the Colorado River. Here, the river does not serve as the state line. The state line lies ahead, and it is hard to see. Photo taken 01/15/07.
Imperial County S-24 ends at the Arizona State Line. From here, the road continues as Imperial Dam Road east to Hidden Springs RV Village, the Yuma Proving Grounds, and U.S. 95. Photo taken 01/15/07.
Orange County S-25 - Chapman Avenue
Imperial County S-26 - Millar Avenue/Boarts Road/Kalin Road/Rutherford Road
Imperial County S-27 - Keystone Road/McConnell Road
Imperial County S-28 - Worthington Road
Imperial County S-29/Drew Road north (and former California 98 west)
Imperial County S-29 is a north-south county highway that extends along Drew Road from California 98 north to Imperial County S-80 in Seeley. Before California 98 was extended to its current terminus near Ocotillo, it used to follow the S-29 corridor to end at former U.S. 80, which is now S-80. Photo taken 08/20/06.
Imperial County S-30/Brockman Road north
Imperial County S-30/McCabe Road north
Imperial County S-30/Forrester Road north
Crossing over Interstate 8 west of El Centro, northbound Imperial County S-30/Forrester Road will pass through the predominantly agricultural valley as it treads along a path west of California 86 and avoids the more populated areas along that state route. Imperial County S-30 will travel north through unincorporated areas until meeting California 78 and 86 in the city of Westmorland. Photo taken 03/14/09.
The next left connects to Interstate 8 west to San Diego. Photo taken 03/14/09.
Imperial County S-30 has two lanes for most of each journey through the Imperial Valley. Watch for trucks and agricultural vehicles. Continue north on the county route to Naval Air Station El Centro. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Ross Road. Photo taken 03/14/09.
This Imperial County S-30 north reassurance shield is posted along Forrester Road after the Ross Road intersection. Imperial County uses cardinal direction banners on most of its county routes, unlike most other county-signed routes in California. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Imperial County S-80/Evans Hewes Highway (Historic U.S. 80). Photo taken 03/14/09.
This mileage sign provides the distance to Westmorland via Imperial County S-30/Forrester Road north (17 miles). Turn left to follow U.S. 80 west to the naval base and state prison. Turn right to follow U.S. 80 east to El Centro (two miles). All motorist services are available east of here in El Centro; very few services are available along U.S. 80 west. Photo taken 03/14/09.
An Imperial County S-80 trailblazer shield is posted prior to the Evan Hewes Highway intersection. Continue straight ahead to follow Imperial County S-30/Forrester Road north to Westmorland. Photo taken 03/14/09.
After the Evans Hewes Highway (U.S. 80) intersection, an Imperial County S-30 north shield is posted along Forrester Road. Photo taken 03/14/09.
Continuing north, Imperial County S-30/Forrester Road crosses the railroad tracks that lead west toward Plaster City and San Diego and east toward El Centro. Photo taken 03/14/09.
Daytime headlights are required on Imperial County S-30/Forrester Road between U.S. 80 and Westmorland. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Hackelman Road. Photo taken 03/14/09.
Tall power lines briefly follow northbound Imperial County S-30/Forrester Road north of Hackelman Road. Photo taken 03/14/09.
The next major intersection along northbound Imperial County S-30/Forrester Road is with Aten Road. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Imperial County S-28/Worthington Road east to the city of Imperial and California 86. Photo taken 03/14/09.
Imperial County S-28 begins at this intersection and travels east through Imperial to cross the valley, ending at California 115. Photo taken 03/14/09.
An Imperial County S-30 trailblazer is posted along Forrester Road after the Worthington Road intersection. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Wienert Road. Photo taken 03/14/09.
Prior to crossing the New River and the Larsen Road intersection, a high-voltage power line crosses over Imperial County S-30/Forrester Road. This line travels north through the Imperial Valley and around the western shore of the Salton Sea to interconnect with the power grid in the Coachella Valley in Riverside County. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Larsen Road. The profile changes as the road abruptly descends into the New River valley. The river cuts through the valley making the area even lower than the surrounding below-sea-level areas. In general, S-30 loses elevation as it travels north. At Mount Signal, S-30 starts at an elevation of 17 feet below sea level, and it lowers to an elevation of 159 feet below sea level in Westmorland. Photo taken 03/14/09.
The New River flows north from Mexicali across the border into the United States, then empties into the Salton Sea. Due to urban runoff and agricultural runoff from nearby farms, the river carries a fair share of pollutants and is thus not safe for entry or use. Its condition has exacerbated problems along the southern portion of the Salton Sea. Photo taken 03/14/09.
A reassurance shield for Imperial County S-30 north is posted after the New River bridge. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Imperial County S-27/Keystone Road east across the Imperial Valley. This county route connects S-30, California 86, California 111, California 115, S-32, and S-33. Photo taken 03/14/09.
An Imperial County S-27 trailblazer shield is posted along northbound Forrester Road at the Keystone Road intersection. This intersection marks the western terminus of S-27. Photo taken 03/14/09.
S-30 turns a bit to the northwest ahead. When roads were laid out in Imperial County in the early 20th century, roads were generally built in a grid pattern from north to south and from south to north. Due to some hasty construction, the alignments of the north-south arterials was not precise, leaving a few curves in the road such as this one. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road crosses the Westside Canal, which carries irrigation water through the western section of the Imperial Valley to nearby farms and local users. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Imler Road west to the United States Navy Bombing Range. Photo taken 03/14/09.
The next major intersection along Imperial County S-30/Forrester Road north is Blais Road. The road takes another brief turn to the northeast then turns north again toward Westmorland. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Cady Road, which travels due east to merge with California 78 and 86 en route to Brawley. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road meets Cady Road. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Andre Road. Photo taken 03/14/09.
An Imperial County S-30 reassurance shield is posted after the Andre Road intersection. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road enters the small city of Westmorland, which had a population of 2,131 as of the 2000 Census. The city sits at an elevation of 159 feet below sea level and consists of only 0.4 square mile. The daytime headlights section ends here. Photo taken 03/14/09.
The speed limit reduces to 25 miles per hour once Forrester Road enters the city of Westmorland and passes by Beverlee Way. Note the lack of pavement markings. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches First Street. Photo taken 03/14/09.
Northbound Imperial County S-30/Forrester Road approaches Second Street. Photo taken 03/14/09.
A trailblazer shield for Imperial County S-30 north along Forrester Road is posted prior to the intersection with the California 78 and 86 expressway (locally known as Main Street). Photo taken 03/14/09.
Only a California 86 trailblazer shield is posted at the intersection between northbound Imperial County S-30/Forrester Road and California 78-86/Main Street in downtown Westmorland. A four-way stop sign governs traffic at this intersection currently. Turn right on California 78-86 east to Brawley or left to California 78 west to Escondido and Oceanside or California 86 north to Indio. Photo taken 03/14/09.
This sign is posted along northbound Imperial County S-30 for the distance to the Salton Sea National Wildlife Refuge after the intersection with California 78-86. Photo taken 03/14/09.
Northbound Imperial County S-30 continues along Forrester Road and prepares to turn east for the final distance to Calipatria. County Route S-30 turns right here on Eddins Road, which leads east to Calipatria and a junction with California 111 and California 115. Continuing north on Forrester Road leads to the Salton Sea National Wildlife Refuge and a hiking trail. Photo taken 12/19/02.
Imperial County S-30 - Gentry Road north
Imperial County S-30 north and Eddins Road east
After curving onto Eddins Road, Imperial County S-30 proceeds east into the city of Calipatria. Entering the downtown intersection, S-30 approaches California 111, which travels north to Coachella and Indio and south to Brawley. Ahead, California 115 will proceed east and then south toward Holtville. Photo taken 06/07/08.
Imperial County S-30 reaches its northern terminus at California 111 and California 115 at a four-way stop sign in downtown Calipatria. No end shield is present here. Photo taken 06/07/08.
Imperial County S-30 scenes
This Imperial County S-30 shield is posted along California 78-86 northwest prior to the Forrester Road intersection in Westmorland. Photo taken 03/14/09.
At Beverlee Way and S-30/Forrester Road in the city of Westmorland, we find this 1961 button copy, porcelain enamel stop sign. The sign does not have any emblems or indication of the entity that installed the sign (state Division of Highways or Automobile Club of Southern California). Given the date stamp, it is likely a state or city issued-sign. Photos taken 03/14/09.
Imperial County S-31/Dogwood Road north
Imperial County S-31 north and K Street east
Imperial County S-31/Eighth Street north
Imperial County S-31 enters the city of Brawley on Dogwood Road, which changes into Imperial Avenue upon crossing the city limits. Rather than travel due north to Plaza Park at the center of town, S-31 instead turns east on K Street, then turns north on Eighth Street. S-31 then travels five blocks north along Eighth Street until meeting Old California 78/Main Street just east of the central business district. The end of northbound Imperial County S-31 is signed with an end shield in Brawley on northbound Eighth Street between G Street and Main Street. Photos taken 10/14/06 and 03/26/06.
This parking regulations sign was posted on northbound Eighth Street just after the end Imperial County S-31 sign. It was placed by the Auto Club of Southern California, which dates to the early practice of the Automobile Club of Southern California (along with the California State Automobile Association) signing regulatory and guide signs throughout California. Photo taken 10/14/06.
Northbound Imperial County S-31 transitions onto northbound California 111. Ahead, California 78 and California 111 travel east-west through Brawley. Use California 78 (Main Street) east to the California 111 expressway south to Interstate 8. Photo taken 03/26/06.
Imperial County S-31/Eighth Street south
Southbound Imperial County S-31/Eighth Street begins its journey after leaving the intersection with Main Street (former California 78 and California 111). A few old, porcelain enamel street signs were posted alongside Eighth Street; some were marked as old Automobile Club of Southern California signs. Photos taken 10/14/06.
Imperial County S-31/Eighth Street is a designated truck route that allows through traffic to avoid Plaza Park and downtown Brawley via Eighth Street, K Street, and Imperial Avenue south, connecting to Dogwood Road. This is yet another old Automobile Club of Southern California sign. Photo taken 10/14/06.
This Automobile Club of Southern California regulatory sign is posted along southbound Imperial County S-31/Eighth Street between H Street and I Street. S-31 will turn west briefly at the intersection with K Street. Photo taken 10/14/06.
Imperial County S-31 south and K Street west
Imperial County S-31/Dogwood Road south
Imperial County S-31/Dogwood Road scenes
This Imperial County S-31 shield assembly is posted somewhere along its route in the Imperial Valley. Photo taken 07/14/02.
Westbound G Street meets Imperial County S-31/Eighth Street at this stop sign, which was placed by the Automobile Club of Southern California. The stop sign features reflectors inside each character of the word STOP and is porcelain enamel. Above the stop sign was a "No U-Turn" sign. Both signs were gone by 2012, replaced with a single modern stop sign. Photo taken 07/14/02.
Imperial County S-32/Orchard Road and Cedar Avenue north
Approaching downtown Holtville while following northbound Orchard Road, which becomes Cedar Avenue as it enters the city limits of Holtville, we find this Imperial County S-32 route marker at the intersection with Fifth Street. The following intersection will be with Fourth Street. Photo taken 10/14/06.
California 115 south, Historic U.S. 80/Fifth Street east, and Imperial County S-32 north
Imperial County S-32/Holt Avenue and Holt Road north
Imperial County S-32/Butters Road north
Imperial County S-32/Butters Road south
Imperial County S-32/Holt Road and Holt Avenue south
Traveling in downtown Holtville, southbound Imperial County S-32/Holt Avenue (Holt Road) travels alongside Holt Park. A porcelain enamel sign welcomes tourists and visitors and advises of a public restroom located within the park. Diagonal parking lines Holt Avenue near the park. Photo taken 10/14/06.
Southbound Imperial County S-32/Holt Avenue (Holt Road) approaches its junction with California 115 and Old U.S. 80/Fifth Street in downtown Holtville. Turn right here for the continuation of Imperial County S-32, as the signed county route turns west briefly (only for two blocks) along with California 115. At the intersection with Cedar Avenue, S-32 will turn south toward Interstate 8, California 7 south, and Calexico East Port of Entry (Garita Numero Dos). Photos taken 03/26/06 and 10/14/06.
California 115 north, Historic U.S. 80/Fifth Street west, and Imperial County S-32 south
Imperial County S-32/Orchard Road south
Imperial County S-32 scenes
This Imperial County S-32 route marker is posted on eastbound Fourth Street in Holtville at the intersection with Orchard Road. Turn left for S-32/Orchard Road (Cedar Avenue) north to downtown Holtville or right for S-32/Orchard Road south to the Interstate 8 and California 7 interchange. Photo taken 10/14/06.
Imperial County S-33 - Bonesteele Road/Miller Road/Highline Road
This Imperial County S-33 route marker is posted along southbound Highline Road after the intersection with Harris Road. Photo taken 06/07/08.
Another Imperial County S-33 route marker is posted along southbound Highline Road between Ferguson Road and Norrish Road in the eastern Imperial Valley. Photo taken 06/07/08.
Nearing its southern terminus, southbound Imperial County S-33/Kavanaugh Road shifts onto Miller Road for the final distance to California 115. Photo taken 06/07/08.
The sun sets over Imperial County S-33/Miller Road as we approach California 115. Photo taken 06/07/08.
Southbound Imperial County S-33/Miller Road reaches its southern terminus at California 115. No end shield is posted. Photo taken 06/07/08.
Imperial County S-34/Ogilby Road north
Imperial County S-34 (Ogilby Road) is the most remote of the Imperial County signed route system, as it passes through arid desert land that is not irrigated and does not pass through any settlements for its entire length between Interstate 8 and California 78. This is the view of County Route S-34 northbound as seen from the vicinity of the S-34 diamond interchange with Interstate 8. In the background, a 500kV San Diego Gas & Electric power line will pass over S-34. Photos taken 06/28/08.
There is no initial S-34 reassurance shield. Northbound Imperial County S-34/Ogilby Road enters Picacho Recreation Lands, which are operated by the federal Bureau of Land Management. The road ahead is straight and flat, with small undulations to match the terrain. Photos taken 06/28/08.
Imperial County S-34/Ogilby Road crosses the Union Pacific Railroad at this at-grade crossing. Watch for stopped or slowed traffic. Photos taken 06/28/08.
Imperial County S-34/Ogilby Road crosses the Union Pacific Railroad at this at-grade crossing. This is the site of Ogilby. Watch for stopped or slowed traffic. Photos taken 06/28/08.
Northbound Imperial County S-34/Ogilby Road reaches Gold Rock Ranch Road. Turn left (west) here to Gold Rock Ranch, which includes a small museum, desert golf course, historic Tumco/Hedges Gold Mine, and RV park (with hours of operation shown on this sign geared toward winter visitors due to the extreme summertime heat). Photos taken 06/28/08.
Imperial County S-34/Ogilby Road continues north under another set of power lines, which travel northwest from here. Photos taken 06/28/08.
The terrain gradually changes along Imperial County S-34/Ogilby Road from flat, arid desert to rolling hills with rocky outcroppings. Photos taken 06/28/08.
Imperial County S-34/Ogilby Road continues north toward its rendezvous with California 78. Dry desert scrub contrasts with the sandy, rocky land. Photos taken 06/28/08.
The desolate highway Imperial County S-34/Ogilby Road sees very limited traffic on its route between Interstate 8 and California 78. No services are available along most of the route. Photos taken 06/28/08.
Coming to its northern conclusion, the Chocolate Mountains come into view along northbound Imperial County S-34/Ogilby Road. Nearing California 78, Imperial County S-34 will end at a stop sign. Photos taken 06/28/08.
Now approaching the north end of the county route, northbound Imperial County S-34 (Ogilby Road) meets California 78 at this intersection just east of Glamis. Turn left (west) to Glamis, which is well known by four-wheelers as a mecca for driving off-road, all-terrain vehicles over seemingly endless sand dunes. Some of this activity has been curtailed recently due to environmental considerations, but it is still a popular attraction. California 78 then continues west to Brawley, Julian, Escondido, and eventually Oceanside. Turn right here for California 78 east/north to Palo Verde and Blythe. Photo taken 06/28/08.
Imperial County S-34/Ogilby Road south
Imperial County S-34/Ogilby Road ends at the south end of the Interstate 8 interchange near the Algodones Sand Dunes. This picture looks south at the dead-end of Ogilby Road after the left turn from S-34 south to Interstate 8 east to Yuma. Photo taken 06/28/08.
Imperial County S-80/Old U.S. Highway 80, known as Evan Hewes Highway in Imperial County (For history, guide, and information, see Historic U.S. 80)


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Page Updated March 5, 2013.

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