Bonneville Hot Springs

Pitch a tent and walk to your soak. Bonneville Campground sits on a bluff above Warm Springs Creek, 19 miles east of Lowman just off Highway 21, and a quarter-mile trail leads from camp to the hot spring's soaking pool. Non-campers pay a $5 day-use fee. The campground runs from the end of May to the end of September; off-season access isn't described, so treat winter as a maybe. On holiday weekends there's a three-night minimum and bookings close four days out, so reserve early on Recreation.gov. Nobody publishes a water temperature, so test it with a hand first.