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Located at 3041 E Mason Lake Drive East in Grapeview (near Shelton), Mason Lake Park offers a public boat launch operated by the Washington Department of Fish and Wildlife. The facility features a boat ramp and public dock, making it convenient for kayakers, canoeists, and motorboaters to access Mason Lake year-round. The 17.36-acre park includes parking for vehicles with trailers, picnic areas, and wooded grounds suitable for a full day of recreation.
Amenities at the access site include restroom facilities, though these are seasonally available (March–October). The lake itself is popular for both recreational boating and fishing, with opportunities to catch largemouth and smallmouth bass, as well as yellow perch. Paddlers should be aware that Mason Lake is known as a power boat and jet ski destination, so expect mixed-use traffic, particularly during warmer months. For specific ADA accessibility details or current facility conditions, check the Washington State Parks website before your visit.