Cottonwood Campground is the only in-park campground in Theodore Roosevelt National Park's South Unit, located 5 miles from Medora along the Little Missouri River with 76 sites (37 reservable, 36 first-come-first-served, and 12 walk-in tent sites).

The campground offers basic amenities including flush toilets, drinking water spigots, and picnic tables, but no hookups, dump station, or showers; it's pet-friendly and provides excellent access to approximately 70 miles of park trails and outstanding wildlife viewing opportunities including bison and wild horses.

Sites fill to capacity daily mid-May through mid-September, so arrive early for first-come-first-served spots or book reservations up to 6 months in advance through recreation. gov.