Evans Plunge

Businessman Fred "Big Fred" Evans built a wood, iron, and glass pool house over a cluster of warm mineral springs in 1890, creating what is still billed as the world's largest naturally warm indoor mineral pool.

📍 Hot Springs, SD 📅 1890–Present 🏛️ Mineral Springs ⚖️ Still Here
Evans Plunge, Hot Springs, SD
Via Wikimedia Commons

The Story

The spring had changed hands several times in the early-1880s land rush — reportedly once traded for a horse worth $35 — before Fred Evans bought the property in 1890 and built a large pool structure directly over the springs, capitalizing on Hot Springs' boom as a Gilded Age mineral-water resort. The naturally ~87°F water still flows continuously through the pool. The original 1890 building was replaced in the 1970s over the same springs, and the City of Hot Springs took over ownership in 2013.

Surprising Facts

→ The spring site was once traded for a horse worth $35 in the early 1880s.

→ The pool stays a naturally warm ~87°F year-round, fed continuously by the springs.

→ The current building dates to the 1970s — same springs, different building.

Frequently Asked Questions

Where is Evans Plunge?
Evans Plunge is at 1145 North River Street, Hot Springs, SD. Explore it on the When It Was interactive map.
How old is Evans Plunge?
Evans Plunge dates to 1890, making it more than 136 years old.
Can you still visit Evans Plunge?
Yes — the site at 1145 North River Street, Hot Springs, SD still stands and remains in use today.

More Black Hills History

Sources

https://www.evansplunge.com/our-story