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 multiple fishable waters including North Pond, Bass Pond, Crappie Pond, and the Walker River.

Fishing is available from mid-February through September 30, with designated camping and day-use areas; note that vessel use is restricted from mid-February through mid-August except on specific ponds and the Walker River.

Waterfowl hunting is permitted only on select days during season, and deer hunting requires shotguns with slugs or archery equipment.