California State Route 166

State Route 166 marker
State Route 166
Map of western California with SR 166 highlighted in red
Route information
Maintained by Caltrans
Length95.886 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
East end SR 99 at Mettler
Location
CountryUnited States
StateCalifornia
CountiesSanta Barbara, San Luis Obispo, Kern
Highway system
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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