Located approximately six miles downstream from New Exchequer, is McSwain Dam, built to serve as a regulating reservoir. The dam was built in 1967 and is named after long-time Merced Irrigation District Chief Engineer and General manager, Kenneth L. McSwain.

The 7.5-mile crystal clear lake provides a paradise for fishing fans or anyone looking for a get-away-day. The lake gently winds through a canyon, with oak-studded hills surrounding both sides.

Regular stockings of trout provide a haven for anglers. Fishing is so good, that several annual fishing events are hosted at Lake McSwain, such as the Lake McSwain Trout Derby, the Skeeter Beaters and Mariposa Fish & Game Association.

The latest fishing information is always available from the Lake McSwain Marina. Its friendly and helpful staff are ready to meet all your fishing and camping needs, with items such as groceries, fishing tackle, rods and reels and bait. Overnight boat slips are also available, as well as a courtesy dock when visiting the store.

Roomy and stable 14-foot fishing boats are available for rent by the day, half-day or by the hour. Paddleboats can also be rented for the kids.

Ideal camping facilities, recreational vehicle amenities and picnicking facilities are also adjacent to the lake.