 The Amargosa River flowed into Lake Tecopa, which was the river's terminal lake.Most of the water in Lake Tecopa came from the Amargosa River and to a lesser degree from the washes that drain Chicago Valley and Greenwater Valley; the total size of its catchment was about and most of its water originated in Paiute Mesa, Shoshone Mountains, Timber Mountains and Yucca Mountains.The catchment of the Amargosa River above Tecopa, California is presently about .