Lewis Lake Access provides a boat ramp near the campground information area for launching motorized and non-motorized boats (canoes, kayaks) on Lewis Lake, with required boat permits and invasive species inspections.

The access point is located about 12 miles north of Yellowstone's South Entrance at 7,800 ft elevation, with nearby vault toilets, water spigots, and picnic facilities, though the campground has a strict 25-foot vehicle length limit and no cell service or shower facilities.