Little Missouri State Park Trail is a standout hiking destination in Killdeer, North Dakota, covering 7.0 miles with 450ft of elevation change. Stats: 7.0 miles, 450ft gain, Moderate. Type: Loop. Surface: Dirt. Time: 3-4 hours. Fee: $7 park fee. Dogs: Yes. Permit: No. Wildlife: mule deer, coyotes, eagles, prairie dogs. Best seasons: Remote North Dakota badlands along the Little Missouri River. Pack water, layers, and appropriate footwear. Conditions vary across North Dakota. Leave No Trace: stay on trail, pack out all waste, respect wildlife.