• The Agate Fossil Hills where mammal fossils were excavated in the early 1900's

    Agate Fossil Beds

    National Monument Nebraska

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Welcome Teachers!


Discover Miocene fossils found in the late 1800's and early 1900's. The great bonebed of Agate documents a mass death event of one rhino type which once roamed North America. Other strange beasts, long extinct, include the chalicothere and entelodont families.

Learn of a friendship between rancher James Cook and Chief Red Cloud of the Oglala Lakota resulting in the James Cook Collection of American Indian artifacts.

Explore the mixed grass prairie and Niobrara River on two trails.

Ranger helping kids on a field trip to Agate Fossil Beds