County Boundary Signs In California

Shasta County Line on CA-299 West.

Lassen County Line on CA-299 west.

Alpine County Line on CA-89 north. Open range.

Welcome to California / Mono County Line on US-395 south.

Alpine County Line on CA-89 south. Alpine County is the smallest county in California by population. CA-89 is posted as a scenic route.

Mono County Line on CA-120 east at Tioga Pass.

Mono County Line on US-395 north.

Los Angeles County Line on CA-14 south. Los Angeles County is the most populous county in the United States according to the 2010 US Census.

Inyo County Line on US-6 west. Taken at the Mono-Inyo county line.

I-10 west at San Bernardino County Line, and Yucaipa City Limits.