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California County Routes in zone S

County Route S1
Location: San Diego County

County Route S2
Location: San Diego – Imperial Counties

County Route S3
Location: San Diego County

County Route S4
Location: San Diego County

County Route S5
Location: San Diego County

County Route S6
Location: San Diego County

County Route S7
Location: San Diego County

County Route S8
Location: San Diego County

County Route S9
Location: San Diego County

County Route S10
Location: San Diego County

There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates county routes in California. The "S" zone includes county highways in Imperial, Orange, Riverside, San Diego, and Santa Barbara counties.

County Route S1, also known as Sunrise Highway for a portion of its length, is a 34.08 mi (54.85 km) long county route located entirely in San Diego County, California. It begins at SR 94 near Barrett and moves northward across Interstate 8, just west of the Laguna Summit. This segment is also known as Buckman Springs Road. North of I-8, it is the Sunrise Scenic Byway, a National Forest Scenic Byway.

The route begins at SR 94 near Barrett not far from the Mexican border. From there, it heads northward along Buckman Springs Road. Soon afterwards, it enters the Cleveland National Forest. When the road reaches Interstate 8, while Buckman Springs Road continues northeastward across the freeway, CR S1 continues in a northwest direction along Old Highway 80, the original alignment of U.S. Route 80 in California. It then closely parallels I-8 for several miles. Upon crossing the freeway at Laguna Junction, CR S1 separates from Old Highway 80 and becomes Sunrise Scenic Byway.


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