Lava Hot Springs is a city in Bannock County, Idaho, United States. It is part of the 'Pocatello, Idaho Metropolitan Statistical Area'. The population was 521 at the 2000 census. Located in the mountainous valley of the Portneuf River the old route of the Oregon Trail and California Trail, the city has become popular resort location, noted for its numerous hot springs amenable to bathing. Lava Hot Springs apartments for rent comparison page shows most up to date rent information on Lava Hot Springs apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.