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.
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.