Evans Plunge Mineral Springs opened in 1890 and is the oldest attraction in the Black Hills! Currently owned & operated by the City of Hot Springs, Evans Plunge is proud to be open year round and offers both an indoor and an outdoor pool, plus a health club, which is included with admission! This is great for families and people of all ages! The water at Evans Plunge is 87 degrees Fahrenheit year-round, which means it is slightly cooler than body temperature but also quite warmer than other pools. Many "hot" water springs tend to smell of Sulphur, but the water here is crystal clear and scentless, which we think is a huge benefit!