Thermopolis is located in the Big Horn Basin of northwest Wyoming, 130 miles west of Casper and about 100 miles south of the East Entrance of Yellowstone National Park. Surrounded by mountain ranges, with the Big Horn River running through town, Thermopolis is the site of the world’s largest mineral hot springs, located in Hot Springs State Park.
Thermopolis population is 3,009. Within 35 minute commute – there are approximately 14,000 people and more than 80,000 people live within a hundred mile radius of Thermopolis.