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Agate Fossil Beds National Monument

National Monument · Nebraska

The visitor center sits in the middle of mixed grass prairie.
From the Fossil Hills Trail the Visitor Center is a ship in a sea of prairie grasses. Photo: NPS Photo

Hours

See this week's hours below.

Entrance fee
The Park Service lists no entrance fee for this site.
Phone
3086654113
Address
301 River Road, Harrison, NE 69346

About Agate Fossil Beds

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.

Hours

Trails

The park's two trails are open from dawn till dusk every day. Visitor Center features Miocene Mammal fossils, a 12 minute movie, and the James H. Cook Collection, a unique collection of American Indian artifacts that were gifts to James Cook and his family.

MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours

Getting there

From US 20: 22 miles south of Harrison, NE on State Hwy 29, then three miles east on River Road (paved) From US 26: 34 miles north of Mitchell, NE on State Hwy 29, then three miles east on River Road (paved). From State Hwy 71: 25 miles west on the unpaved portion of River Road.

Weather

Summers can be very warm, high 90's to 100 with the frequent afternoon thunderstorms. Plan to hike early and come down from the higher points if storms threaten. Winter temperatures can dip as low as -20 with snow and wind. Heaviest snows can be expected in late Spring.

Things to do

Arts and Culture, Astronomy, Birdwatching, Bookstore and Park Store, Cultural Demonstrations, Food, Guided Tours, Hiking, Junior Ranger Program, Museum Exhibits, Park Film, Picnicking, Self-Guided Tours - Walking, Shopping, Stargazing, Wildlife Watching.

Source: National Park Service data feed, checked September 24, 2026. Hours shown are the Park Service's posted standard hours plus any date changes it lists. Official page for Agate Fossil Beds ↗