Discover year-round relaxation and family fun at Evan’s Plunge in Hot Springs, South Dakota — a historic indoor mineral spring attraction established in 1890. Featuring naturally heated 87-degree water from the southern Black Hills, this iconic destination offers pools, water slides, hot tubs, a splash zone, and aquatic fitness areas. Located near Wind Cave National Park and Custer State Park, Evan’s Plunge combines history, wellness, and affordable indoor water park fun in the heart of the Black Hills.