The Amargosa River Natural Area is located at the south end of Tecopa Valley, and occupies the heart of the Tecopa Basin, east of the southeastern corner of Death Valley National Park. The area has a harsh climate, unobstructed views of desert mountains, and few human settlements.

Interesting place to visit for more information from BLM

http://www.blm.gov/ca/st/en/fo/barstow/amargosa.html