SR 25 (also known as Bolsa Road and the Airline Highway) begins at the intersection of Peach Tree Road and
State Route 198 about 11 miles west of
Priest Valley, in
Monterey County, and is the northern extension of Peach Tree Road. It heads northwest, crossing into
San Benito County and passing through the community of
Bitterwater. SR 25 provides access to the
Pinnacles National Park east entrance, running parallel to the
San Andreas Fault. Running parallel to the
Gabilan Range and
Diablo Range, SR 25 passes through the communities of
Paicines and
Tres Pinos before reaching the city of
Hollister. Upon reaching Hollister, the route turns into a four-lane undivided road, curving north and west through the east side of the city. North of Hollister, SR 25 reverts into a 2-lane road and continues northwest from Hollister, intersecting with
State Route 156. From there, the route is a partially divided road until just short of a railroad crossing and eventually crossing the Pajaro River into Santa Clara County. The route then heads northwest, and at the intersection with
Bloomfield Avenue, the route then curves west before its northern terminus at
U.S. Route 101 south of Gilroy. SR 25 is part of the
California Freeway and Expressway System, and a small portion near Hollister is part of the
National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the
Federal Highway Administration. SR 25 is eligible to be included in the
State Scenic Highway System, but it is not officially designated as a scenic highway by the
California Department of Transportation. ==History==