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California State Route 25

Route map:
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State Route 25 marker

State Route 25

SR 25 highlighted in red
Route information
Maintained by Caltrans
Length74.632 mi[1] (120.109 km)
Major junctions
South end SR 198 near Priest Valley
Major intersections
North end US 101 near Gilroy
CountryUnited States
CountiesMonterey, San Benito, Santa Clara
Highway system
SR 24 SR 26

State Route 25 (SR 25) is a state highway in the U.S. state of California between State Route 198 in Monterey County and U.S. Route 101 in Santa Clara south of Gilroy. For most of its length, SR 25 runs through the center of San Benito County.

Route description[edit]

Looking north along SR 25 in San Benito County, California
View of SR 25

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.[2] 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.[3]

SR 25 is part of the California Freeway and Expressway System,[4] and a small portion near Hollister is part of the National Highway System,[5] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[6] SR 25 is eligible to be included in the State Scenic Highway System,[7] but it is not officially designated as a scenic highway by the California Department of Transportation.[8]


The Airline Highway Association was organized in 1933-4 and was composed of representatives of Alameda, Santa Clara, San Benito, Kern and Kings Counties. Its purpose was to establish this "Airline Highway". In the Oakland Tribune article, (Tues. June 19, 1934 page 5. "NEW AIRLINE, HIGHWAY TO L.A. PLANNED") it states "the highway would follow the air line between the northern and southern part of the state as closely as possible". The use of the word Airline is confusing as we associate it with modern-day transportation. In this sense it is defined as an Americanism dating back to 1805 meaning "traveling a direct route".[9]

Major intersections[edit]

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 to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

MON 0.00-11.75
0.00 SR 198 – Coalinga, San LucasSouth end of SR 25
San Benito
SBT 0.00-60.08
BitterwaterKing City Road (CR G13) – King CityNorthern terminus of CR G13
21.47 SR 146 – Pinnacles National ParkEastern terminus of SR 146 eastern segment
Paicines39.53 CR J1 (Panoche Road) – Panoche, IdriaWestern terminus of CR J1
Hollister49.95Tres Pinos Road, Sunnyslope RoadTres Pinos Road is former SR 25 north

SR 156 Bus. (San Felipe Road) – Los Banos, Hollister
Former SR 25 south / SR 156
54.05 SR 156 – Los Banos, San Juan BautistaConverted to a turbo roundabout in 2024[12]
Santa Clara
SCL 0.00-2.56
CR G7 (Bloomfield Avenue)Eastern terminus of CR G7
2.56 US 101 – Gilroy, SalinasInterchange; north end of SR 25; US 101 exit 353
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b c California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
  2. ^ The San Andreas Fault - III. Where Is It?
  3. ^ The Road Atlas (Map). Rand McNally. 2009. p. 14. § SB4-SD5.
  4. ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  5. ^ Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 18, 2017.
  6. ^ Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
  7. ^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  8. ^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 18, 2017.
  9. ^ Oakland Tribune article, Tues. June 19, 1934 page 5. "NEW AIRLINE, HIGHWAY TO L.A. PLANNED."
  10. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  11. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
  12. ^ "California debuts 'turbo roundabout' to fix troubled intersection near Bay Area". SFGate.com. January 2, 2024.

External links[edit]

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