Step Back in Time...Four to Three Million Years Ago!

Did you know that horses evolved in North America? The Hagerman horse, Equus simplicidens, is the first true one-toed horse. It's the park's most famous fossil, but we have fossils from over two hundred other species too! From the saber-toothed cat, mastodon, bear, camel, and ground sloth, to smaller animals like rodents and frogs, the scientific study of Pliocene fossils is the key to Hagerman.

A fossil horse skull pasted onto a brown Hagerman landscape.

Home of the famous Hagerman horse

Hagerman horse fossil skeletons were excavated in the early 1930s by the Smithsonian Institution. These skeletons were studied worldwide.

Lontra weiri is a new fossil species of river otter.

Other Fossils and New Discoveries

Lontra weiri lived at Hagerman over 3.8 million years ago and is the oldest known ancestor of today’s American river otters.

concept art of the new visitor center exterior.

Visitor Center

We're counting down to the opening of the new Thousand Springs Visitor Center later this year!

You too can become a Hagerman Fossil Beds Jr Ranger

Become a Hagerman Fossil Beds Jr Ranger.

If you are between the ages of 6 and 100+ years old, we invite you to become a Hagerman Fossil Beds Junior Ranger.

Last updated: June 21, 2021

Contact the Park

Mailing Address:

PO Box 570
Hagerman, ID 83332


(208) 933-4105

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