• Knightia eocaena mass mortality

    Fossil Butte

    National Monument Wyoming

Fees & Reservations

diplomystus dentatus
Diplomystus dentatus, a surface feeder
NPS photo of Fossil Country Museum specimen

Fossil Butte National Monument does not charge a fee but donations are welcome. Visitors may purchase annual National Parks and Federal Recreational Lands Passes at the visitor center.

Did You Know?

undescribed bat

The oldest known bat fossils are from the Fossil Lake deposits of the Green River Formation in southwestern Wyoming.