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State Route 146
State Route 146
	SR 146 highlighted in red
Route information
	Maintained by Caltrans
Length	12.632 mi (20.329 km) SR 146 is broken into pieces due to a gap in the description, unfilled by any route.
Section 1
West end	US 101 near Soledad
East end	Pinnacles National Park west boundary
Section 2
West end	Pinnacles National Park east boundary
East end	SR 25 near Paicines
Location
Country	United States
State	California
Counties	Monterey, San Benito
Highway system
	State highways in California; Interstate; US; State; Scenic; History; Pre‑1964; Unconstructed; Deleted; Freeways;

State Route 146 (SR 146) is a state highway in the U.S. state of California in Monterey and San Benito Counties. The route serves as an entryway to Pinnacles National Park, located in the Gabilan Mountains, from both U.S. Route 101 in the Salinas Valley on the west and State Route 25 near Paicines on the east. The route is broken into two sections and cannot be used to completely pass through Pinnacles National Park.

Route description

Route 146 is divided into two sections and does not provide a continuous vehicular route through the park. The western part of Route 146 passes from U.S. Route 101 near Soledad along Metz Road and Shirttail Canyon Road to the west area of Pinnacles. The eastern portion runs into the east area of Pinnacles from Route 25 along Pinnacles Road.

Highway 146 has the distinction of following the San Andreas Fault line for much of its length. As it does, it straddles two separate landmasses: the Pacific Plate and the North American Plate.

SR 146 is not part of the National Highway System,^[2] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.^[3] SR 146 is eligible for the State Scenic Highway System,^[4] but it is not officially designated as a scenic highway by the California Department of Transportation.^[5]

History

According to the National Park Service, Pinnacles has been administered as a wilderness area as long as that unit has been under their jurisdiction, and NPS sources contacted during research cannot recall any time when Route 146 proceeded through the park unbroken.^{[original research?]}

Major intersections

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.

County	Location	Postmile ^[1]^[6]^[7]	Destinations	Notes
Monterey MON 0.00-10.08	Soledad	0.00	US 101 – San Francisco, Los Angeles	Interchange; west end of SR 146; US 101 exit 302
	Soledad	0.55	Monterey Street
		3.48	CR G15 (Metz Road) – King City
San Benito SBT 10.08-15.15	Pinnacles National Park	10.19	East end of state maintenance at western park boundary
			Chaparral Trailhead	East end of western segment of route
		Gap in route; no passable road through park
			Old Pinnacles Trailhead	West end of eastern segment of route
		12.71	West end of state maintenance at eastern park boundary
		15.15	SR 25 – Hollister, King City, Coalinga	East end of SR 146
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

^ ^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.
^ Federal Highway Administration (March 25, 2015). National Highway System: California (South) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved September 25, 2017.
^ 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.
^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved September 25, 2017.
^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006