Map of western California with SR 166 highlighted in red
Route information
Maintained by Caltrans
Length
95.886 mi[1] (154.314 km)
SR 166 is broken into pieces, and the length does not reflect the US 101 and SR 33 overlaps that would be required to make the route continuous.
Major junctions
West end
SR 1 in Guadalupe
Major intersections
SR 135 in Santa Maria
US 101 in Santa Maria
SR 33 from Cuyama Valley to Maricopa
I-5 near Mettler
East end
SR 99 at Mettler
Location
Country
United States
State
California
Counties
Santa Barbara, San Luis Obispo, Kern
Highway system
State highways in California
Interstate
US
State
Scenic
History
Pre‑1964
Unconstructed
Deleted
Freeways
← SR 165
→ SR 167
State Route 166 (SR 166) is a state highway in the U.S. state of California. It connects the Central Coast to the southern San Joaquin Valley, running from State Route 1 in Guadalupe and through Santa Maria in Santa Barbara County to State Route 99 in Mettler in Kern County.
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