Welcome To Lava Hot Springs! Customer Appreciation Day is December 12, 2018! Everybody gets into the Hot Pools for Free! 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. Indoor Aquatic Center Open Year-Round! Rates & Hours. 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. Outdoor Swimming Complex Closed until next summer! See 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. Lava Hot Springs Videos!