Where's the Hayward Fault?

Lake Temescal is a resevoir in the rift valley of the Hayward Fault. It is located near the intersection of Highways 23 and 13 in the Montclair District of the Oakland Hills. Temescal creek has a right-lateral ben where it folws out of the hills east of Highway 13 one mile south of the lake.

View of Lake Temescal from the north. The active trace of Hayward Fault runs along the eastern shore of the lake. The lake is a modified sag pond along the straight valley of Temescal Creek.