Gypsum Wash is an ephemeral stream or wash in Clark County, Nevada, originally a tributary of Las Vegas Wash before the formation of Lake Mead. Due to changes in the reservoir's water level, it's now once again a tributary of Las Vegas Wash, exposed at coordinates 36°07′04″N 114°50′54″W. When Las Vegas Bay is at its full level, Gypsum Wash flows into Lower Gypsum Wash Cove. Its source is in the Dry Lake Range. 

This is just a fun spot to let the dogs run around and play and take a short hike though the wild desert landscapes.