State Route 113 is a north–south state highway in the U.S. state of California that runs from around 10 miles (16 km) in the Sacramento Valley west of Rio Vista at State Route 12 to State Route 99 in Tudor. It serves as one of two important connecting routes between Interstate 80 and Interstate 5, bypassing Sacramento to the east; the other being Interstate 505 to the west. Past the southern terminus are Collinsville and Birds Landing around the Suisun Bay marshes. Cities along the route include Dixon, Davis, and Woodland. It also shares a stretch of Interstate 80 between just outside UC Davis and Dixon. The section running from Dixon to Woodland is a controlled-access freeway; the remainder is a standard road of two to four lanes. The freeway section spanning from the I-80 interchange in Davis to Woodland is called the Vic Fazio Highway, after the former U.S. House representative of the Davis area, who is credited with obtaining the funding for the freeway upgrade of that section.

The Sacramento Valley is the area of the Central Valley of the U.S. state of California that lies north of the Sacramento–San Joaquin River Delta and is drained by the Sacramento River. It encompasses all or parts of ten Northern California counties. Although many areas of the Sacramento Valley are rural, it contains several urban areas, including the state capital, Sacramento. Since 2010, statewide droughts in California have further strained both the Sacramento Valley's and the Sacramento metropolitan region's water security.