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

    Agate Fossil Beds

    National Monument Nebraska

There are park alerts in effect.
show Alerts »
  • Park phone lines intermittently out of service

    If you cannot reach the park by phone, please click the Contact Us link on the left side of this page to email a ranger. Staff will call or email back during business hours.

Fossils and Much, Much More

During the 1890s, scientists rediscovered what the Lakota Sioux already knew - bones preserved in one of the most complete Miocene mammal sites in the world.

Yet, this place called "Agate" is a landscape that reflects many players – from early animals roaming the valleys and hills, to tribal nations calling the High Plains home, to explorers passing through or settling in the American West.

Did You Know?

This painting hangs in the Den exhibit in the Cook Gallery.

Red Cloud, a chief of the Oglala Lakota Sioux, was one of the most photographed American Indians. More than 128 photos were taken of him during his lifetime. An oil painting of Red Cloud painted at the Agate Springs Ranch hangs in the “Den” exhibit in the James H. Cook Gallery. More...