Baker Hot Springs is a small, natural hot springs located in Central Utah, not too far from Delta, Utah. The source of the hot springs is around 180F, but a trench helps the water flow down to three large tubs and cools off the further you are away from the source. The tub closest to the source is the hottest, the middle tub is, well in the middle for temperatures, and the furtherest is the coolest. However, you can "regulate" the temperature by using one of the provided rags to block out the hot water and let cold water from a pipe in.
Crystal Hot Springs is a natural hot springs in Northern Utah that ranges from 120-134 degrees F. The swimming pools are regulated so that you can soak in a range of temperatures from 98-105F. Crystal Hot Springs also contains the highest mineral content found in the world! It has roughly 46,000 mg/L - the average hot spring has closer to 1,000 mg/L. You'll notice this mineral content, as you lick your lips or wipe your hands over your face - it's very salty tasting. Get ready to soak in a 22,000 year old hot spring!
Lava Hot Springs is located in Idaho, about a 2 hour drive north of Salt Lake City. The natural, geothermal hot springs range in temperatures from 102F-112F degrees. The hot water is full of minerals, but has no sulfur, and therefor no bad smells of rotten eggs lurking in the air. Lava Hot Springs is open year round, but the best time to go, of course, is the Winter months. With five outdoor hot pools, the steam from the hot springs wraps around people and creates a very relaxing atmosphere. The red tents above provide shade on sunny days. Be sure to bring plenty of water and a snack to the hot springs - sitting for too long in hot water will dehydrate you and will make some people feel faint.