The park is open all year. Portions of the South Unit Scenic Loop Drive and North Unit Scenic Road may be closed in winter due to snow and ice.
Air service is available into the North Dakota towns of Bismarck, Dickinson and Williston.
The South Unit entrance is in Medora, ND. Medora is accessible via Interstate 94 Exits 24 and 27 in North Dakota. Medora is 133 miles west of Bismarck, ND and 27 miles east of the Montana state line.
The North Unit entrance is along U.S. Highway 85, approximately 16 miles south of Watford City, ND and 50 miles north of Belfield, ND. The distance by road from Medora to the North Unit is approximately 70 miles. I-94 travelers can access U.S. Highway 85 at Exit 42 in Belfield, ND.
Bus transportation via Greyhound is available along I-94. The bus stops in Medora, three blocks from the park entrance. There is no public bus transportation along Highway 85 and to the North Entrance.
Train service via Amtrak is available into Williston, ND.
Both units of the park have scenic drives. The South Unit road makes a 36-mile loop from the entrance. The North Unit road is 28 miles roundtrip. There are over 100 miles of trails in the park.