Five percent of Yellowstone National Park is covered by water. From rivers to large, quiet lakes, Yellowstone National Park offers a great deal to someone who is interested in boating. A permit is required for all watercraft in Yellowstone National Park. It's a $20 annual fee and a $10 seven day fee for motorized watercraft. For non-motorized watercraft, the annual fee is $10 and the seven day is $5. Permits can be obtained from West Entrance, NE entrance, Mammoth backcountry office, Bechler Ranger Station, Canyon backcountry office, Old Faithful backcountry office, south entrance, Lewis Lake campground, Grant Village backcountry office, Bridge Bay ranger station, and the West Yellowstone Chamber of Commerce.

A wearable floatation device is required for anyone wishing to boat in Yellowstone National Park.