County Route S1 (California)
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County Route S1 in San Diego County, California begins at a junction with California State Route 94 at Cameron Corner. It runs north about 10 miles on Buckman Springs Road, and west about 3 miles on Old Highway 80, which was once part of U.S. Route 80.
It then crosses over Interstate 8 and runs north about 23 miles on Sunrise Highway through the Laguna Mountains to its end at a junction with California State Route 79.
Sunrise Highway is one of the best scenic drives in San Diego County.