State Route 4 (California)

State Route 4
SR 4 highlighted in red
Route information
Defined by
Maintained by Caltrans
Length:	197 mi (317 km)
Existed:	1934 – present
Tourist routes:	Ebbetts Pass Scenic Byway
Restrictions:	Segment through Ebbetts Pass closed in winter
Major junctions
West end:	San Pablo Avenue in Hercules
	I-80 in Hercules I-680 in Concord SR 242 in Concord SR 160 near Antioch I-5 in SR 99 in SR 49 in Angels Camp
East end:	SR 89 near Markleeville
Location
Counties:	Contra Costa, San Joaquin, Stanislaus, Calaveras, Alpine
Highway system
State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 3 I-5 →

State Route 4 Business
Location:	Angels Camp, California
Existed:	2013–present

State Route 4 (SR 4) is a state highway in the U.S. state of California, routed from Interstate 80 in the San Francisco Bay Area to State Route 89 in the Sierra Nevada. It passes through Ebbetts Pass and contains the Ebbetts Pass Scenic Byway, a National Scenic Byway.

SR 4 roughly parallels the Sacramento-San Joaquin River Delta, a popular area for boating and fishing. There are a number of accesses to marinas and other attractions.

SR 4, an east–west highway, begins in Hercules at San Pablo Avenue next to the Interstate 80 junction as part of John Muir Parkway. (The actual parkway extends a bit past the western terminus.) The road is an expressway from its starting point until it approaches Martinez, at which point it becomes a full freeway (the California Delta Highway) passing Concord, Pittsburg, and Antioch. The John Muir National Historic Site is located directly north of Route 4 on Alhambra Avenue in Martinez. Alhambra Avenue at SR 4 is also the site of the Franklin Canyon Adobe. BART tracks run in the median of the freeway from the Port Chicago Highway interchange in Concord to the Bailey Road interchange in Bay Point, where the line currently ends at the Pittsburg/Bay Point Station. Access to that station is provided by a pedestrian bridge crossing over the eastbound lanes of Highway 4. The eBART light rail line continues rom there in the median until Antioch station. After Antioch, the freeway turns southward at its intersection with State Route 160, turning into a suburban and rural road bypassing the Bay Area's rapidly growing andoutermost eastern suburbs (Oakley, Brentwood and Discovery Bay, California); this section is also known as the John Marsh Heritage Highway.