Highway 101, as it is still referred to in northern San Diego County, is a heavily used road. Portions still retain the old feel, others have been completely changed and modernized. On a nice summer afternoon, 101 is a great drive from Oceanside to San Diego. Each town encountered has a different look and feel to it. Most embrace the historic aspect of the highway, and have put up signs to that end. Through San Diego and south to the Border, US 101 is a more inland route, going on the east side of San Diego Bay, heading through cities the whole way.
State Line UP on Beyer Blvd where old US 101 passed under the San Diego and Arizona Eastern RR in San Ysidro. The San Diego Trolley Blue Line now uses the structure as well as freight traffic bound for Mexico.
Historic US 101 signage on San Diego Ave in Old Town San Diego.
San Diego Ave through Old Town.
Gilman Drive section of former US 101 from I-5 to UCSD in 2021.
1942 Callan Road OC and wooden railing near Torrey Pines
Sorrento Overhead near Del Mar
Section of single-slab concrete bypassed in the early 1930’s just north of Cannon Road in Carlsbad, CA.
