Discover The Mammoth Site in Hot Springs, South Dakota. The Mammoth Site boasts the largest concentration of mammoths in the world. You can tour this indoor active dig site and view Ice Age fossils. The Mammoth Site offers guide tours, enhanced educational experience with a gaming app and Summer Educational Programs. The Mammoth Site is open year round Learn more.

News & Blog

The Mammoth Site received a surprise last month when the new analysis for the new age of the Sinkhole was confirmed as being at least 140,000 years old. The Mammoth Site dates back to the Pleistocene (Ice Age) and so far all of the geochemical dating (such as radiocarbon dating) has indicated that the sinkhole was full of warm water and struggling mammoths about 26,000 years ago. Dr. Jim Mead, Chief Scientist of The Mammoth Site Science Team wanted to take a closer look at assessing the age and finding a more precise date – they wanted to try new technique.
Dr. Steve Holen, a Mammoth Site Science Associate and Board Member has been collaborating with a colleague Dr. Shannon A. Mahan of the US Geological Survey in Denver for a number of years. They have been using OSL (Optically Stimulated Luminescence) dating on some of Holen’s mammoth sites in Nebraska and around the region. So, on January 8, 2016, a group assembled at The Mammoth Site and took a number of samples of sediments to analyze for OSL dating.

New Hours at The Mammoth Site Beginning May 15, 2018

The Mammoth Site of Hot Springs, SD Inc. is announcing its new summer hours starting May 15 through August 15, 2018.
The new hours will be 8:00 a.m.-8:00 p.m. daily and the last tour will be at 7:00 p.m. each day.
For more information, please contact Bethany Cook at or at 605-745-6017.
“In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, age, disability, religion, sex, familial status, sexual orientation, and reprisal.” (Not all prohibited bases apply to all programs).

Mother’s Day, Sunday, May 13, 2018 visit The Mammoth Site for free with three non-perishable food items per person.

Enjoy Mother’s Day at The Mammoth Site. Visitors can visit The Mammoth Site for Free, Sunday May 13, 2018 by bringing three non-perishable food items per person. The items that are brought to the Site will be donated to the Hot Springs Food Pantry for KOTA Care and Share Food Drive.