Mason Valley WMA Access provides entry to a 17,742-acre wildlife management area in Lyon County featuring diverse habitats from desert shrub to wet meadows with numerous ponds and the Walker River.

The area offers fishing opportunities on multiple waters (open February-September), waterfowl hunting on designated days, and camping at designated sites.

Vehicle access is available via designated roads, with vessel use restricted during certain periods (February 15-August 15) to protect nesting wildlife.