Flathead Lake is one of America's largest, cleanest bodies of water. Not to mention, it's absolutely beautiful.
Tongue River Reservoir is a small town state park in Montana worth exploring. This 12-mile-long reservoir is situated along the open prairies of southeastern Montana.
Some hidden gems require a bit of time and effort to reach, but this remote lake in Montana — and the hiking trail to get there — are well worth the adventure.
Trail of the Cedars in Glacier National Park is a short, accessible hike with beautiful natural scenery.