The Temecula Valley (Spanish: Valle de Temecula)[1][2] is a graben rift valley in western Riverside County, California.

It lies between the Wildomar Fault on the east, at the foot of the Temescal Mountains and of the Temecula Basin and the Willard Fault on the west, at the foot of the Santa Ana Mountains.

The Temecula Valley lies northwest of Temecula Creek, and its head (33°36′46″N 117°17′33″W / 33.61278°N 117.29250°W / 33.61278; -117.29250) is south of the Elsinore Valley, from which it is divided by a low rise between the Temescal and Santa Ana Mountains.

Their confluence forms the Santa Margarita River.

This Riverside County, California-related article is a stub.