Mono Lake Basin State Road

State Route 120
SR 120 highlighted in red
Route information
Defined by
Maintained by Caltrans
Length	153 mi (246 km) (Does not include the portion in Yosemite)
Existed	1934 – present
Tourist routes	Tioga Road/Big Oak Flat Road
Restrictions	Segment through Tioga Pass closed in winter
Major junctions
West end	I-5 near Lathrop
	SR 99 near Manteca SR 108 in Oakdale SR 49 near Chinese Camp to SR 41 / SR 140 in Yosemite National Park US 395 in Lee Vining
East end	US 6 at Benton
Location
Counties	San Joaquin, Stanislaus, Tuolumne, Mono
Highway system
State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 119 SR 121 →

State Route 120 (SR 120) is located in central California. It runs from the San Joaquin Valley near Lathrop through Yosemite National Park, to its end at U.S. Route 6 in Mono County, eastern California. While the route is signed as a contiguous route through Yosemite National Park, the portion in park boundaries is federally maintained, and is not included in the state route logs. The portion at Tioga Pass is the highest paved through road in the California State Route system. This part is not maintained in the winter and is usually closed during the winter season.

SR 120 begins as a freeway intersecting Interstate 5 to extend Interstate 205 through Manteca. In east Manteca the freeway ends at SR 99 and becomes a highway which continues to head east through Escalon, Oakdale and other various small towns. East of Oakdale there are no highly populated areas for 90 miles (144 km) as it heads into the foothills of the Sierra Nevada and into Yosemite National Park. After leaving Crane Flat within Yosemite, it is known as Tioga Pass Road (or often simply Tioga Road), and it retains that name as it travels through Tuolumne Meadows and over Tioga Pass at an elevation of 9,945 feet on its 59-mile (95 km) journey to its intersection with U.S. Route 395, at Lee Vining. After a jog to the south along US 395, it continues east as Mono Mills Road, skirting the south end of Mono Lake and providing access to the Mono Lake South Tufa as well as the historical site of Mono Mills before cresting Sagehen Summit and ending with the intersection of U.S. Route 6 at Benton. Both the portions through Yosemite National Park and the stretch south of Mono Lake are subject to winter closure. Usually the highway is open through Tioga Pass by the Memorial Day weekend at the end of May, and typically closes for the winter sometime in November.