Little Hole National Scenic Trail

Although the trail starts free and flowing and returns to those conditions in many places throughout, it does get rocky and narrow in just as many places. You'll also encounter several man-made boardwalks covering sections of the trail next to jutting rock or uneven ground.

This is Butch Cassidy country, an area he was well known to hide out in after pulling a heist. You can imagine him or the mountain men before him discovering this country while you're hiking along the river.