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 the second Saturday in February through September 30, with designated camping and day-use areas throughout the property.

Vessel use is restricted February 15-August 15 except on select ponds and the Walker River, where boats must maintain flat-wake speeds not exceeding 5 nautical miles per hour.