The Tate Geological Museum celebrates ‘Mammoth Day’ March 14
The Tate Geological Museum will host “Mammoth Day” on March 14 to celebrate the 20th anniversary of Dee, an 11,600-year-old Columbian mammoth. (Casper College image/drawing Russell Hawley)
The Tate Geological Museum will celebrate “Mammoth Day” Saturday, March 14, from 10 a.m. to 2 p.m. The event commemorates the 20th anniversary of the discovery of Dee the Mammoth.
“We’re commemorating 20 years since the discovery of Dee, the largest mounted Columbian mammoth in North America! This free event includes a talk on ‘Mammoths Across Wyoming,’ an exploration of the flora and fauna of Dee’s world, and a celebration with cupcakes and lemonade,” said Dalene Hodnett, director of museums at Casper College.
“Mammoth Day” celebrates the museum’s Columbian mammoth, Dee. Dee, an 11,600-year-old Columbian mammoth, Mammuthus columbi, lived in the American West during the Pleistocene, or the ice age, and is the world’s largest and most complete mounted Columbian mammoth.
Attendees will learn how Dee was discovered, excavated, and assembled, and will learn about the flora and fauna of Dee’s environment, according to Hodnett. Children 12 and under will receive a free mammoth poster while supplies last.
The event is free and open to the public. The Tate Geological Museum is at the southern end of the Casper College campus; look for the life-size bronze T. rex near the museum.
Key Takeaways:
- What: Mammoth Day Celebration
- When: Saturday, March 14, 2026, from 10 a.m. to 2 p.m.
- Where: Tate Geological Museum at the southern end of the Casper College campus
- Cost: Free and open to the public
- Milestone: 20th Anniversary of the Discovery of Dee the Mammoth
- Highlights: “Mammoths Across Wyoming” talk, Ice Age environment exploration, and a celebration with cupcakes and lemonade
- For Kids: Free mammoth posters for children 12 and under, while supplies last