California State Route 4

East-west California state highway connecting the Bay Area to the Sierra Nevada, including the scenic Ebbetts Pass.

California State Route 4 runs roughly 317 kilometers east to west from the San Francisco Bay Area near Hercules to Ebbetts Pass in the Sierra Nevada. The route passes through the Sacramento–San Joaquin River Delta — a popular boating and fishing area — before climbing through the Sierra foothills and up into the mountains. The section crossing Ebbetts Pass carries the designation of a National Scenic Byway, known as the Ebbetts Pass Scenic Byway. During summer months, this mountain stretch draws motorcyclists and road trip travelers seeking dramatic alpine scenery.