California State Route 154
|Defined by S&HC § 454|
|Maintained by Caltrans|
|Length:||32.30 mi (51.98 km)|
|Restrictions:||No hazardous material along the segment through the San Marcos Pass between SR 246 and US 101|
|West end:||US 101 near Los Olivos|
|East end:||SR 1 / US 101 in Santa Barbara|
State Route 154 (SR 154) (also known as the Chumash Highway or unofficially as San Marcos Pass Road after the signage) runs from Los Olivos to Santa Barbara, California, USA. Before U.S. Route 101 was built, this was the main throughway to Santa Barbara and the tri city area including use as a Stagecoach route in early years. After being replaced by US 101 as the primary route between the Santa Ynez Valley and Santa Barbara, SR 154 now serves as a scenic alternative.
It is a 2 lane road with some passing lanes, with the highest altitude being 2000 ft. It rivals US 101 for traffic, but it goes through the Los Padres National Forest and the San Marcos Pass. It starts in Los Olivos as a spur from US 101, goes through the town, and then the end of SR 246 at Santa Ynez. It then reaches Lake Cachuma and passes through the Los Padres National Forest, and across the Cold Spring Canyon Arch Bridge, where Cold Spring Tavern is on Stagecoach Road which passes below the bridge. Nearby it crosses Camino Cielo Road to the East and West, then the intersection of Painted Cave Road and Old San Marcos Road before descending to Santa Barbara. It then briefly becomes four lanes and passes an offramp for SR 192 (named Foothill Road to the East and Cathedral Oaks Road to the West of SR 154), before stopping at Calle Real and a Southbound onramp to US 101 and ending at the point where State Street to the East becomes Hollister Avenue to the West.
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions). Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in Santa Barbara County.
|Zaca Station||R0.00||US 101 – Santa Maria, Santa Barbara||Interchange|
|R8.11||SR 246 west / Armour Ranch Road – Santa Ynez, Solvang, Buellton|
|West end of freeway|
|R31.55||32||SR 192 east (Foothill Road) / Cathedral Oaks Road|
|East end of freeway|
|Santa Barbara||32.28||US 101 (SR 1)||Interchange|
|32.28||State Street||Continuation beyond US 101|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- "Special Route Restrictions". Caltrans. Retrieved 2014-07-28.
- January 1, 2006 California Log of Bridges on State Highways
- ACR 75
- CA Codes (shc:250-257)
- CA Codes (shc:260-284)
- Staff. "State Truck Route List" (XLS file). California Department of Transportation. Retrieved August 21, 2012.
- California Department of Transportation, Log of Bridges on State Highways, April 2008
- California Department of Transportation, All Traffic Volumes on CSHS, 2007