Mason Valley WMA Access provides public access to the Walker River and numerous ponds across 17,742 acres of diverse habitat in Lyon County.

The area offers fishing opportunities on multiple waters (Hinkson Slough, North Pond, Bass Pond, Crappie Pond, and Walker River) open from mid-February through September 30, with designated camping and day-use facilities available.

Vessel use is restricted February 15-August 15 except on specific ponds, and a 5 nautical mph speed limit applies where boats are permitted.