Silurian Valley is a valley in the Mojave Desert, in San Bernardino County, California. The valley trends in a north–south direction, its mouth located just southeast of the south end of Death Valley at 35.6214°N -116.2686°W. Its head is at 35.3933°N -116.1339°W. The valley is drained by Salt Creek a tributary of the Amargosa River and contains Silurian Lake and Dry Sand Lake.
Silurian Valley is bounded on the northwest by the Salt Spring Hills; on the north by the Dumont Dunes and Dumont Hills; on the west by the Avawatz Mountains; on the northeast by the Kingston Range; on the east by the Valjean Valley and Silurian Hills and on the southeast and south by the Soda Mountains.