California "S" County Routes

Return to AARoads
 
 
 
 
Site Navigation
Baja California
California
Colorado
Idaho
Hawaii
Nevada
New Mexico
Oregon
Utah
Washington
Wyoming
 
 

California "S" County Routes

Group One: S-1 to S-5

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 Route A-1, and the highest route is Imperial County Route 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:

San Diego County Route S-1/Buckman Springs Road north
This view looks north on S-1/Buckman Springs Road. In the distance are the four-way stop intersection with Old Highway 80, and beyond that is the junction with Interstate 8 (Exit 51) and Buckman Springs Rest Area. Photo taken 11/10/12.
Northbound San Diego County Route S-1/Buckman Springs Road meets Old Highway 80 at this four-way stop sign. Turn left here for the continuation of S-1 via Old Highway 80 west. Continue north on Buckman Springs Road to Interstate 8 (Exit 51) and Buckman Springs Rest Area. Photo taken 11/10/12.
This San Diego County Route S-1 trailblazer route marker along northbound Buckman Springs Road used to be signed as county route 10. Photo taken 11/10/12.
San Diego County Route S-1 north and Old Highway 80 (Historic U.S. 80) west
San Diego County Route S-1/Sunrise Highway north
Northbound San Diego County Route S-1 leaves Old Highway 80 (former U.S. 80) east of Pine Valley and prepares to ascend the Laguna Mountains via Sunrise Highway. Here County Route S-1 crosses over Interstate 8. Photo taken 06/22/04.
Almost immediately, San Diego County Route S-1/Sunrise Highway begins its ascent into the Laguna Mountains. Photo taken 06/22/04.
The highway hugs the cliffs tightly as it ascends; the road was built onto a shelf on the side of the mountain overlooking Pine Valley to the west. Photo taken 06/22/04.
Sunrise Highway originally skirted around each undulation on the ascent to the Laguna Mountains, but some of these curves were straightened out through cuts such as this one along northbound. Photo taken 06/22/04.
Northbound San Diego County Route S-1 at Milepost 17. Note that most of the plant material is sagebrush and chaparral; more trees become common at higher elevations. Photo taken 06/22/04.
Sure enough, the forests of the Laguna Mountains (part of Cleveland National Forest) rise as the Sunrise Highway gains elevation. Photo taken 06/22/04.
The county uses its own variation of elevation sign; here at 5,000 feet, the Sunrise Highway reaches a meadow amidst the trees. Unlike the burned areas of Cuyamaca Rancho State Park to the west, most of these areas south of Laguna Mountain have not seen fire since the 1971 Laguna Fire. Photo taken 06/22/04.

San Diego County Route S-1 continues to pass through the meadow before entering another section of forest. Photo taken 06/22/04.
San Diego County Route S-1/Sunrise Highway enters the Laguna Mountain Recreation Area of the Cleveland National Forest. Photo taken 06/22/04.
Sunrise Highway is a National Forest Scenic Byway, as indicated by this shield (found along northbound after entering the recreation area). Photo taken 06/22/04.
Tall pine trees amidst sagebrush dot the skyline. Parking is permitted on the side of the road through this area, as a trailhead and information kiosk is located on the right (east) side of Sunrise Highway. A National Forest Adventure Pass ($5 per day) is required for parking; a pass may be obtained in Pine Valley or Laguna Mountain. Photo taken 06/22/04.
Northbound San Diego County Route S-1 approaches the county road station in the Mount Laguna community. Photo taken 07/24/02.
Southbound San Diego County Route S-1 at the Burnt Rancheria Campground on Mount Laguna in the Cleveland National Forest. Photo taken 07/24/02.
After passing through the community of Laguna Mountain (not photographed), the Sunrise Highway begins to enter the areas damaged by the October 2003 Cedar Fire. Photo taken 06/22/04.
Through this section (between Laguna Mountain and Kwaaymii Road), most of the trees burned and died. Only a few sticks remain to demonstrate the awesome power of fire. Photo taken 06/22/04.
Northbound San Diego County Route S-1 approaches its northern terminus at its junction with California 79. California 79 north leads to Julian; California 79 south leads to Lake Cuyamaca. Photo taken 07/24/02.
End Northbound San Diego County Route S-1 as it approaches its junction with California 79 north of Rancho Cuyamaca State Park and Mount Laguna. San Diego County typically signs the ends of its county routes with END banners. Photo taken 07/24/02.
This mileage sign is posted at the north end of S-1/Sunrise Highway where it meets California 79. While this intersection marks the northern terminus of San Diego County Route S-1, motorists may turn left on California 79 south to Rancho Cuyamaca State Park or turn right on California 79 north to Julian. Photo taken 07/24/02.
San Diego County Route S-1/Sunrise Highway south
San Diego County uses green mileposts on its county routes, unlike the state highway department (Caltrans) or most other local highway departments. This picture shows Milepost 23 along southbound San Diego County Route S-1 on Mount Laguna, 23 miles north of the southern terminus of San Diego County Route S-1 on California 94. Photo taken 07/24/02.
San Diego County Route S-1 south and Old Highway 80 (Historic U.S. 80) east
San Diego County Route S-1/Buckman Springs Road south
This mileage sign -- located on southbound Buckman Springs Road between Interstate 8 and Old Highway 80 -- provides the distance to Lake Morena (eight miles) and Campo (12 miles) via San Diego County Route S-1/Buckman Springs Road south. Photo taken 11/10/12.
Southbound Buckman Springs Road approaches Old Highway 80 and San Diego County Route S-1. Photo taken 11/10/12.
Now at the intersection of Old Highway 80 and Buckman Springs Road, we find this San Diego County Route S-1 trailblazer shield. Continue ahead for S-1 south along Buckman Springs Road to Campo. Turn right for S-1 north and Historic U.S. 80 west to Pine Valley and Mt. Laguna. Turn left here for Historic U.S. 80 east to Boulevard and Jacumba. Photo taken 11/10/12.
Leaving the intersection with Old Highway 80, this mileage sign on southbound S-1/Buckman Springs Road provides the distance to Lake Morena County Park (seven miles) and Potrero County Park (19 miles). Photo taken 11/10/12.
Southbound S-1/Buckman Springs Road travels south to Campo, where the Pacific Southwest Railway Museum is located. Photo taken 11/10/12.
This view looks south on S-1/Buckman Springs Road. Photo taken 11/10/12.
Scenes Pertaining to San Diego County Route S-1/Sunrise Highway
This sign is located in central Pine Valley, along the connector road between Interstate 8 (Pine Valley exit) and Old Highway 80. A right turn on Old Highway 80 leads to San Diego County Route S-1/Sunrise Highway, which leads to the Laguna Mountains. A left turn leads to Guatay and Descanso as well as Junction California 79, which leads north to Julian (25 miles). Photo taken 11/11/00.
This warning sign, located across from the Mount Laguna general store and restaurant along San Diego County Route S-1, indicates that it is against the law to throw snowballs at people or cars passing by. During the winter, snow can fall during storms. Photo taken 07/24/02.
Signage for Cleveland National Forest access roads near San Diego County Route S-1/Sunrise Highway on Mount Laguna. Photo taken 07/24/02.
This view, found from an overlook near the NORAD weather radar, demonstrates how Sunrise Highway got its name. Vast views of the morning sun, rising over the Imperial Valley and Laguna Mountain Foothills, provides a dramatic vista on any morning. Photo taken 06/22/04.
The brown, stark desert contrasts with the green trees found in the Laguna Mountains. This view is seen from the desert view turnoff from County Route S-1. Photo taken 06/22/04.
This view of the desert floor is seen from the Kwaaymii Road vista point. Photo taken 06/22/04.
Another view of the desert floor as seen from Kwaaymii Road. Photo taken 06/22/04.
Scenes Pertaining to San Diego County Route S-1: Abandoned Section Near Kwaaymii Point
For a time, plans called for the Sunrise Highway to skirt along the edge of the cliffs leading down to the desert via Kwaaymii Road. This idea was abandoned due to the narrow right of way and extensive rocks that fell from the cliffs above. This picture shows the northernmost section of the abandoned Sunrise Highway as seen looking south. Photo taken 06/22/04.
A retaining wall was considered for supporting the proposed highway, and it remains in place even after the highway was no longer present. Photo taken 06/22/04.
View of the abandoned Sunrise Highway as seen from near the retaining wall. This area is now part of a hiking trail that connects with Sunrise Highway southwest of here. Photo taken 06/22/04.
Imperial County Route S-2/Imperial Highway north
Imperial County Route S-2 begins at California 98 in western Imperial County. At this diamond interchange, Imperial County Route S-2 north approaches Interstate 8 near Ocotillo. Turn right to Interstate 8 east to El Centro and west to San Diego. Photo taken 04/19/08.
Northbound Imperial County Route S-2 meets the onramp to Interstate 8 east to El Centro near Ocotillo. The next left connects to Interstate 8 west to San Diego. Photo taken 04/19/08.
After passing under Interstate 8's twin bridges, northbound Imperial County Route S-2 meets the onramp to Interstate 8 west to San Diego. The next intersection is with Imperial County Route S-80 (Old U.S. 80)/Evan Hewes Highway east to Plaster City and El Centro. Photo taken 04/19/08.
Immediately thereafter, Imperial County Route S-2/Imperial Highway north approaches Junction Imperial County Route S-80/Evan Hewes Highway (Old U.S. 80) in Ocotillo. Photos taken 04/19/08.
Northbound Imperial County Route S-2/Imperial Highway meets Junction Imperial County Route S-80/Evan Hewes Highway (Old U.S. 80) at this intersection. Turn right to follow Old U.S. 80 east to Plaster City, Seeley, and El Centro. Photo taken 04/19/08.
Northbound Imperial County Route S-2/Imperial County enters the unincorporated community of Ocotillo. Photos taken 04/19/08 and 07/22/03.
Northbound Imperial County Route S-2 enters Anza-Borrego Desert State Park; it will change into a San Diego County route after crossing the county line in the park. Photo taken 07/22/03.
Scenic, desolate beauty is the rule along County Route S-2 in the state park. Photo taken 04/19/08.
San Diego County Route S-2/Imperial Highway north
San Diego County Route S-2/Sweeny Pass Road north
San Diego County Route S-2/Great Southern Overland Stage Route of 1849 north
California 78 east and San Diego County Route S-2 north
San Diego County Route S-2/San Felipe Road north
Skipping ahead, northbound San Diego County Route S-2/San Felipe Road meets San Diego County Route S-22. County Route S-22 leads east to Borrego Springs and the Salton Sea in Imperial County. Photo taken 05/29/02.
San Diego County Route S-2 proceeds northwest after leaving the junction with San Diego County Route S-22 near Ranchita. Photo taken 04/20/13.
A San Diego Gas and Electric power line crosses over San Diego County Route S-2 between the S-22 and California 79 junctions. Photo taken 04/20/13.
San Diego County Route S-2 passes through mostly rural, rolling hills in a pastoral setting. Winter rains often make these hills green in spring. Photo taken 04/20/13.
Continuing northwest, San Diego County Route S-2 approaches its junction with California 79. Note the truck restriction for California 79 north en route to Warner Springs and Temecula. Photo taken 04/20/13.
California 79 travels north toward Warner Springs and then northwest to Temecula. To the left, California 79 travels south toward Santa Ysbel and Julian, with a connection to California 76 west to Palomar Mountain and Interstate 15. Photo taken 04/20/13.
A mileage sign provides the distance to Warner Springs (four miles to the north) and Santa Ysabel (12 miles to the south). Photo taken 04/20/13.
San Diego County Route S-2 meets its northern terminus at its junction with California 79 northwest of Borrego Springs. California 79 leads north to Warner Springs and Temecula; southbound leads to Santa Ysabel, Ramona (via California 78), Julian, Mount Laguna (via San Diego County Route S-1/Sunrise Highway), Rancho Cuyamaca State Park, and Descanso/Junction Interstate 8. Photos taken 04/20/13 and 07/27/02.
A single California 79 trailblazer shield assembly is posted at the northern terminus of S-2 (San Felipe Road). Photo taken 04/20/13.
San Diego County Route S-2/San Felipe Road south
San Diego County Route S-2 begins its southbound journey after its junction with California 79 near Warner Springs. During the winter, snow can fall during storms. Photo taken 07/24/02.
Southbound San Diego County Route S-2 passes through a few small communities in remote eastern San Diego County, including the unincorporated community of San Felipe. Photo taken 07/24/02.
California 78 west and San Diego County Route S-2 south
San Diego County Route S-2/Great Southern Overland Stage Route of 1849 south
Scenic, desolate beauty is the rule along County Route S-2 in Anza-Borrego Desert State Park. Photo taken 04/19/08.
San Diego County Route S-2/Sweeny Pass Road south
San Diego County Route S-2/Imperial Highway south
Imperial County Route S-2/Imperial Highway south
Now traveling southeast, County Route S-2 leaves San Diego County and enters Imperial County. Photo taken 07/22/03.
After the intersection with Imperial County Route S-80, northbound Imperial County Route S-2 approaches Interstate 8 west to San Diego (right turn) and then Interstate 8 east to El Centro and Yuma (left turn). Photo taken 04/19/08.
This Imperial County Route S-2 reassurance shield is posted after the Interstate 8 interchange and is the last one before the county route ends at California 98 in western Imperial County. Photo taken 04/19/08.
Soon thereafter, southbound Imperial County Route S-2 approaches its junction with California 98. Photo taken 05/07/06.
Imperial County Route S-2 reaches its southern terminus at the junction with California 98. Turn left here for California 98 east to Calexico or right for California 98 west to Interstate 8 west to San Diego. Photo taken 05/07/06.
Scenes Pertaining to San Diego and Imperial County Route S-2
San Diego County Route S-2 passes through the Anza Borrego Desert State Park, offering incredible views of the desert far below the heights of Mount Laguna and the Cuyamacas. This series of pictures shows some of these desert vistas. Photos taken 07/27/02.
These desert views are found along northbound San Diego County Route S-2. Photos taken 07/22/03.
San Diego County Route S-3/Yaqui Pass Road north
San Diego County Route S-3/Borrego Springs Road north
Northbound San Diego County Route S-3 reaches its northern terminus at Christmas Circle in Borrego Springs, where it connects with San Diego County Route S-22. Photo taken 04/20/13.
All traffic must turn right here and use the traffic circle to connect to S-22 east to Salton City, Borrego Springs Road north for local access, or S-22 west to Ranchita, S-2, and California 79. Photo taken 04/20/13.
San Diego County Route S-3/Yaqui Pass Road south
San Diego County Route S-3/Borrego Springs Road south
San Diego County Route S-3 begins its southbound journey on Borrego Springs Road upon leaving Christmas Circle in the center of the unincorporated community of Borrego Springs near Anza-Borrego Desert State Park. This is the first southbound reassurance route marker on S-3. California 78 is about 12.5 miles south of here. Photo taken 04/20/13.
San Diego County Route S-4/Poway Road east
San Diego County Route S-4 is one of a handful of remaining signed county routes within the city limits of San Diego. This shield is located along eastbound Poway Road, just north of the Cara Knott Bridge and just east of its junction with Interstate 15. Photos taken 06/22/02.
Skipping ahead and now in the city of Poway (population was 47,811 as of the 2010 Census, incorporated on December 1, 1980, and has the motto "The City in the Country"), this San Diego County Route S-4 route marker is posted along eastbound Poway Road after the intersection with Historic U.S. 395/Pomerado Road. S-4 will proceed east along Poway Road through Poway toward its junctions with S-5/Espola Road and California 67 near Iron Mountain. Photo taken 06/25/09.
Services abound on both sides of Poway Road as it passes through the center of the city of Poway. Eastbound San Diego County Route S-4/Poway Road meets Civic Center Drive at this traffic signal. Turn right to the Poway City Hall, Community Park, Library, and Sheriff Substation. Photo taken 06/25/09.
Eastbound San Diego County Route S-4/Poway Road meets Community Road at this traffic signal. Shopping malls are located on each of the four corners of this busy intersection. Photo taken 06/25/09.
The next major intersection along eastbound San Diego County Route S-4/Poway Road is with Midland Road. Turn left (north) on Midland Road to Old Poway Park, which is located near the intersection with Aubrey Street. Photo taken 06/25/09.
Eastbound San Diego County Route S-4/Poway Road meets Midland Road at this traffic signal. Photo taken 06/25/09.
After the intersection with Olive Tree Lane, Poway Road makes a 90-degree turn toward the north. Garden Road continues east from this point, connecting to Sycamore Canyon Road south toward Scripps Poway Parkway and the large open space preserve south of there. A mileage sign points the way to Ramona and Lakeside via S-4 east and California 67 north and south, respectively. Photo taken 06/25/09.
This San Diego County Route S-4 reassurance route marker is posted along Poway Road after the Garden Road intersection. Photo taken 06/25/09.
Curving toward the northeast, San Diego County Route S-4/Poway Road climbs uphill and then will descend a bit before meeting Espola Road (San Diego County Route S-5). Photo taken 06/25/09.
The next major intersection along eastbound San Diego County Route S-4/Poway Road is with San Diego County Route S-5/Espola Road. S-5 travels northwest along Espola Road, passing Poway Lake, before connecting to Rancho Bernardo Road and Pomerado Road until its northern terminus at Interstate 15. Photo taken 06/25/09.
A mileage sign along San Diego County Route S-4/Poway Road east provides the distance to Ramona and Lakeside (12 miles via S-4 east, which contradicts the prior mileage sign), Escondido (13 miles via S-5 north), and Lake Poway (three miles via S-5 north). Photo taken 06/25/09.
San Diego County Route S-4 and S-5 trailblazers are posted along eastbound Poway Road just before the junction with Espola Road. This intersection marks the southern terminus of S-5. After this intersection, the road narrows and returns to one eastbound lane. Photo taken 06/25/09.
An unusual warning sign advises of the possibility of falling rock and flooding. Photo taken 06/25/09.
San Diego County Route S-4/Poway Road gains elevation once more. Open space abounds on both sides of this stretch of Poway Road, which is quite a bit different from the central business district which was bustling with activity. Nevertheless, this is a very busy road since it is the best route from downtown Poway to California 67. Photo taken 06/25/09.
A few side roads (Millards Road, Blue Crystal Trails) along this section of San Diego County Route S-4/Poway Road connect to local residences and ranches, but none are designed to routes for through traffic. Photo taken 06/25/09.
Open sky and rolling hills with rocky outcroppings dominate the view along eastbound S-4. Photo taken 06/25/09.
A roadside pullout offers a call box (likely placed by the city of Poway) along San Diego County Route S-4/Poway Road eastbound. This is a bit different from how call boxes are typically posted by the state or county. Photo taken 06/25/09.
Eastbound San Diego County Route S-4/Poway Road approaches Mina de Oro Road. Photo taken 06/25/09.
The far eastern end of San Diego County Route S-4/Poway Road travels through rural eastern Poway. Milepost 8.5 is signed alongside Poway Road between Mina de Oro Road and California 67. Photo taken 06/25/09.
Eastbound San Diego County Route S-4/Poway Road approaches California 67; a mileage sign advises of the destinations available on California 67. Turn left for California 67 north to Ramona (nine miles) or right for California 67 south to Lakeside (nine miles) and El Cajon (16 miles). Photo taken 06/25/09.
A California 67 trailblazer shield is posted along San Diego County Route S-4/Poway Road east. Photo taken 06/25/09.
An END San Diego County Route S-4 shield is posted along eastbound Poway Road prior to the California 67 intersection. This marks the eastern terminus of the nine-mile-long route. Photo taken 06/25/09.
Eastbound San Diego County Route S-4/Poway Road meets California 67 at this traffic signal. A second mileage sign is posted at the end of the "T" intersection. Iron Mountain dominates the skyline behind the traffic signal; hikers may climb the mountain from a trailhead that originates near the S-4/67 junction. Photo taken 06/25/09.
San Diego County Route S-4/Poway Road west
San Diego County Route S-5/Espola Road north
San Diego County Route S-5 north and Rancho Bernardo Road west
San Diego County Route S-5 and Historic U.S. 395/Pomerado Road north

Back to County Route R-2 Return to the California Gateway Continue to County Route S-6

Page Updated June 11, 2013.