Last updated: March 9, 2022
Note: Toadstool Geologic Park is managed by the USDA Forest Service and is not part of the National Park System.
Toadstool Geologic Park is a collection of badlands formations found in the Oglala National Grassland of Nebraska. The rock formations found in this park formed 38-24 million years ago and are related to the same rocks found in South Dakota’s Badlands National Park. These parks also share many fossil animals, like ancient dogs (hesperocyon), horses (mesohippus), and rhinoceroses (subhyracodon). Many of these fossil animals went extinct and do not have modern analogues, like brontotheres, oreodonts, and entelodonts. Perhaps one of the most exciting preservations in Toadstool Geologic Park is the .75 mile-long trackway that reveals an ancient pursuit: hungry entelodonts chasing two species of rhinoceros down a stream channel.
There are two main trails in Toadstool Geologic Park. A one-mile loop trail leaving from the picnic area shows excellent examples of the hoodoos the park is known for -- and comes with an interpretive brochure for a self-guided tour available at the interpretive kiosk. This one-mile loop trail also accesses the three-mile Bison Trail, which ends at the Hudson Meng Bonebed.