Mason Valley WMA Access provides entry to the 17,742-acre Mason Valley Wildlife Management Area in Lyon County, featuring the Walker River floodplain and numerous ponds and wetlands.

The area offers fishing opportunities on multiple waters including Hinkson Slough, North Pond, Bass Pond, and the Walker River (open February-September), with designated camping and boat access available at specific locations.

Visitors should note that vessel operation is restricted during breeding season (February 15-August 15) on most waters, and waterfowl hunting is limited to specific days during season.