County Boundary Signs In California

Mono County Line on US-6 East.

Inyo County Line on US-6 west. US-6 is part of the Grand Army of the Republic Highway. Taken at the Mono-Inyo county line.

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.