Welcome To Lava Hot Springs! Relax at The World Famous Hot Springs at 430 E. Main St. or play year round at our Indoor Aquatic Center & Olympic Swimming Complex, just 4 blocks away! Lava Hot Springs Hot Pools Open year-round! Rates & Hours Relax in our World Famous Natural Hot Springs! Our Geothermal Hot Springs range from 102˚ to 112˚. We are open year round except for Christmas and Thanksgiving. Located at 430 East Main. Outdoor Swimming Complex Opens Friday May 25th! See the full schedule Summer Rates & Hours Our outdoor Olympic Pool, Diving Platforms, Water Slides and Indoor Pool are open all summer! Located 4 blocks west of the Hot Pools at 195 N. Center. Indoor Aquatic Center Open year-round! Summer Rates & Hours start May 18, 2018. See details. Our 6 lane, 25 yard pool provides year round shaded, indoor fun for all ages with a diving board, Aqua Climb Wall, Hot Pool and Portneuf Kiddie Cove. Party room rentals available. Lava Hot Springs Videos!