• View of the Monument across the Snake River

    Hagerman Fossil Beds

    National Monument Idaho

Explore a fossiliferous Pliocene-aged site!

Did you know horses evolved in North America?  The Hagerman Horse, Equus simplicidens, was the first true horse but its bones most closely resembled Grevy’s zebra bones.

Hagerman is home to over two hundred different species of fossil plants and animals: including sabertooth cat, mastodon, bear, camel, ground sloth, and many other species.  Over 3,000 new fossil fragments are found each year.

Did You Know?

Horse fossil removed during the 1929 excavation of the Fossil Beds.

The Smithsonian began excavating the Fossil Beds in 1929. J.W. Gidley conducted the first excavation. Altogether they conducted 4 major excavations of the area.