The Clark County Wetlands Park is the largest park in the Clark County park system. The park is located on the east side of the valley and runs from the various water treatment plants along the Las Vegas Wash to where the wash flows under Lake Las Vegas and into Lake Mead.

One purpose of the park is to reduce the environmental impact of the waste water and storm runoff leaving the area. This is being done by installing a series of water flow control structures such as dams and weirs and by creating ponds that together slow down the flow of the water, catching silt, and reducing the undercutting of the dirt walls that form the wash.

The sides of the wash are being stabilized by installing native plants and large pieces of demolished construction debris. Some of the native plants, especially those in the areas of standing water, also help to purify the water by removing various pollutants.

The park has a visitors center and miles of walking paths.