Lonesomehurst Campground Boat Ramp provides direct water access to Hebgen Lake's South Fork Arm with a well-maintained launch facility and dock.

The ramp is located within the campground (26 sites available, some with electric hookups) approximately 20 minutes west of West Yellowstone, making it a convenient base for boaters and anglers.

Amenities include potable water, vault toilets, picnic tables, and a boat cleaning station, though the access road (Denny Creek Road) is unpaved and can be rough.