Buttermilk Boat Ramp provides concrete launch facilities with docks located at Buttermilk Campground on Island Park Reservoir, offering convenient access for boating, kayaking, and paddleboarding.

The ramp is situated between the group camping and single-family camping loops, with paved access roads leading to the facility and nearby amenities including vault toilets, drinking water, and RV hookups at the adjacent 55-site campground.