Lake Henry Lakeside Use Area Boat Ramp on the south shore features a gravel boat ramp with courtesy docks, ample paved parking for vehicles with trailers, and amenities including a vault toilet and picnic area for day use.

The entire lake is designated as a "no wake zone," making it suitable for calm-water boating and fishing. Public access is managed by the South Dakota Department of Game, Fish and Parks, located approximately 5 miles south and 3 miles east of De Smet.