 It is bordered by the Pilot Mountains to the west, and the Silver Island Mountains to the southeast.Springs are located in the alluvial fans at the base of the Pilot Range, and no water flows from the Silver Island Mountains.Shallow groundwater (e.g., Bettridge Creek, with threatened Lahotan cutthroat trout) along the western edge of the playa varies from fresh water to brine over a distance of about 2,000 feet.