Follow the Little Missouri Trail (white blazes) north along the Little Missouri River. The trail is fairly level but crosses the river three times and two significant tributaries making it impassible when the water is high. Call the ranger station if there have been heavy rains or take note of the water level when you cross the bridge at Albert Pike. A small hot spring has been reported in this area about 5 minutes south of the Crooked Creek crossing, between the trail and the river.
At 6.3 miles you'll come to the scenic Little Missouri Falls, its namesake picnic area and the second trailhead. The trail swings west and continues its level march along the river for another 4.1 miles and 3 more crossings. The first crossing is an old bridge and the other 2 are usually dry boulder hops.