Sully Creek State Park Trail is a standout hiking destination in Medora, North Dakota, covering 5.5 miles with 350ft of elevation change. Stats: 5.5 miles, 350ft gain, Moderate. Type: Loop. Surface: Dirt. Time: 3 hours. Fee: $7 park fee. Dogs: Yes. Permit: No. Wildlife: mule deer, coyotes, wild turkeys, rattlesnakes. Best seasons: Rugged badlands canyon trail in southwest North Dakota. Pack water, layers, and appropriate footwear. Conditions vary across North Dakota. Leave No Trace: stay on trail, pack out all waste, respect wildlife.