Examine a fossiliferous Pliocene-aged site!

Do you know 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 fossil evidence of over two hundred different species. From 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. Read More

Fossil skeleton of the Hagerman horse mounted standing

New World Horse and other wonders

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.

shovels off trail side

Volunteers Needed

Trail work, visitor contact, and other volunteer jobs wait for you

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 12, 2020

Contact the Park

Mailing Address:

PO Box 570
Hagerman, ID 83332


(208) 933-4105

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