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There are several county routes in Lake County, California that are numbered using a different system than that of the rest of the state. County routes in California are typically numbered using a region letter followed by a number. Routes in Northern California are in regions A, B and D. Central California has regions E, G and J while letters N, R and S are assigned to Southern California. Lake County uses numerical designations for their county routes, bypassing the alphanumeric designations of the rest of the state.
County Route 145
County Route 145 is a county highway in Lake County. It was paved in 1984.
County Route 502
County Route 502 is a county highway in Lake County. It was constructed to allow access to Konocti Bay.
County Route 505
County Route 505, also known as Gaddy Lane, is a county highway in Lake County.