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 fishing available on multiple waters including the Walker River, North Pond, Bass Pond, and Crappie Pond from mid-February through September 30.

The area offers designated camping sites and vessel access on select ponds with flat-wake speed restrictions (5 nautical miles per hour maximum), though trespass is prohibited in the eastern pond area from mid-February through mid-August during nesting season.