The 8 Best Hot Springs Hotels in the U.S. - AFAR

"A family-friendly Montana riverside resort founded in the late 19th century that offers multiple thermal pools (about 100–106°F), a 55°F cold plunge, and salt-treated pools held between 90 and 100°F; the springs contain minerals such as calcium, fluoride, sodium, and sulfate that are traditionally associated with various health benefits. Overnight options include two lodges and roughly 25 cabins along the canyon and river, and on-site dining ranges from a full-service restaurant to a casual tavern. The property’s setting along the Clark Fork River and proximity to winter scenery make it appealing year-round, and offerings are tailored to families as well as couples seeking restorative soaking." - Michelle Baran