Length: 13.4 miles long
A prominent stream on the east side of the Snake Range, 16 miles south of Baker.
Big Wash is the southernmost major stream in the Snake Range, a major, but hidden stream that drains the southernmost peaks of the range. The creek courses southeast from the headwaters of Mt. Washington down into Pruess Lake (Utah) in the Snake Valley. The majority of Big Wash sits protected within the boundaries of Great Basin National Park with a short stretch of water on the lower stream privately-owned by the Big Wash Guest Ranch. Public access is limited to hiking upstream from the Guest Ranch. Despite its difficult access and hidden attributes, Big Wash is one of the last remaining strongholds of the endangered Bonneville Cutthroat Trout. Currently, the National Park Service (NPS) has plans in the making to provide public access to the upper reaches of Big Wash.