The species is widespread across much of
California as well as southwestern
Oregon. It is distributed along the
Coast Ranges from
Douglas County, Oregon, south to
San Luis Obispo County, California; in the
Klamath Mountains, the
Cascade Range, and the
Sierra Nevada from Siskiyou to Kern counties, California; and in the
Central Valley. The grapes are a common sight along the banks of the
Sacramento River. The plant grows in canyons, alongside springs, and streams. It tends to thrive in damp conditions and so it is common in riparian areas. like most other native California plants it can withstand periods of dry conditions. ==Cultivation==