According to the United States Census Bureau, the city has a total area of 0.7 square miles (1.8 sq km), all of it land. 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 on the old route of the Oregon Trail and California Trail, the city has become a popular resort location, noted for its numerous hot springs amenable to bathing and a turbulent innertube run through part of the town. As of the census of 2000, there were 521 people, 232 households, and 125 families residing in the city. The population density was 730.7 people per square mile (283.3/sq km). There were 309 housing units at an average density of 433.4 per square mile (168.0/sq km). The racial makeup of the city was 96.93% White, 1.15% Native American, 0.19% Asian, 1.34% from other races, and 0.38% from two or more races. Hispanic or Latino of any race were 2.30% of the population.