If you’re visiting Glacier National Park in Montana, we recommend adding Upper Missouri River Breaks National Monument to your trip. Famous for its riverside cliffs, the monument spans 149 miles of the Upper Missouri River and includes six wilderness study areas. This amazing landscape has remained largely unchanged in the more than 200 years since Meriwether Lewis and William Clark traveled through it on their epic journey. Within the monument you can float the river, fish, hike, hunt, drive for pleasure, find a little solitude, enjoy a sense of exploration in a remote setting, or simply marvel at the variety of natural beauty. Check out more national park neighbors to add to your next adventure: https://on.doi.gov/SideTrips. Photo by Bob Wick, @mypubliclands.