From National Monuments

Agate Fossil Beds National Monument

Know Before You Go

Designation
National Monument
State
NE
Park address
Harrison, NE
Entrance fee
No entrance feeNPS data as of 2026-08-25
Check current conditions on the official NPS site

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Notes

  • Designation Date: 01/01/1997

  • In the early 1900s, paleontologists unearthed the Age of Mammals when they found full skeletons of extinct Miocene mammals in the hills of Nebraska -- species previously only known through fragments. At the same time, an age of friendship began between rancher James Cook and Chief Red Cloud of the Lakota. These two unprecedented events are preserved and protected here... at Agate Fossil Beds.

Tags

National Monuments