Mason Valley WMA Access provides entry to a 17,742-acre wildlife management area in Lyon County featuring the Walker River floodplain and numerous ponds and wetlands.

The area offers fishing opportunities on multiple waters including the Walker River, North Pond, Bass Pond, and Crappie Pond (open February through September), along with designated camping and picnic sites.

Vessels are restricted during certain seasons but allowed on select waters year-round with flat-wake speed limits.