All watercraft entering Yellowstone National Park must be inspected for aquatic invasive species.
National Park Service staff conduct inspections seven days per week at the Bridge Bay and Grant Village boat ramps and at the South Entrance Ranger Station.
Boats intended for use on Lewis Lake must be inspected at Grant Village or the South Entrance before launching.
All motorized and non-motorized watercraft, including kayaks, canoes, paddleboards and float tubes, must also have a Yellowstone boat permit. The Park Service says Grand Teton National Park permits are no longer valid for boating in Yellowstone.
Boat and float tube permits can be purchased at various parks facilities.
Motorized boating is only allowed on Yellowstone and Lewis lakes, while non-motorized boating is allowed on most other park lakes.