A short hike through beautiful Tobacco Root Mountains forest leads to a secluded spring that’s just right. Potosi Hot Spring is reportedly soakable for a fee but why bother when Nupotosi is arguably more beautiful and completely free? The pool is surrounded by a log fence (which keeps cattle out and water clean) and easy to spot. Crystal clear water, a gravel bottom and well placed rocks to sit on make for the perfect bath. Take in the views and enjoy!