The Mammoth Site of Hot Springs South Dakota announced in 2011 it now has discoverd 60 specimens of prehistoric animals in this unique paleontological site, where more than 26,000 years ago, large Columbian and woolly mammoths were trapped and died in a spring-fed pond: now the in-situ Mammoth Site in Hot Springs, South Dakota. Dr. Larry Agenbroad, founder of the site is our guide.