Keyhole State Park Campground offers 10 campgrounds with 300 total RV and tent sites around Keyhole Reservoir, with the Tatanka Campground being the only area featuring water and electricity hookups.

Reservations are required May 1-September 30 (call 1-877-996-7275), while sites are first-come, first-served outside these dates; the park is open year-round and includes amenities such as boat ramps, a marina, dump stations, and vault toilets.

Located 6 miles north of I-90 exit 165 near Moorcroft, the park provides convenient access to the reservoir for boating, paddling, and water recreation.