Agnostik
National Monument · WY

Fossil Butte National Monument

In the ridges of southwest Wyoming are some of the best-preserved fossils in the world. They tell the story of ancient life in a warm, wet environment in and around a freshwater lake. Stingrays swam in the lake. Turtles basked in the sun. Leaves rustled in the breeze while early horses darted between the trunks. We reveal more of the past with each fossil found.

nps.gov ↗

Photos

Fish fossils, Knightia eocaena, exposed near cliff
Knightia eocaena, the most abundant vertebrate fossil in the world, lies exposed near cliff face.
a well preserved fossil fish, Cockerellites liops
Fossils from the Green River Formation are known for their excellent preservation, abundance, and diversity. Cockerellites liops is one of the common fishes found here.
fossil palm frond
Fossil palm fronds and other plants indicate a climate similar to the Gulf Coast states.
A scenic view of Fossil Basin in early summer; yellow limestone, red mudstones and green vegetation
Early Summer Beauty in the High Desert of Southwestern Wyoming
visitor center with Fossil Butte in the background
The visitor center is nestled in a sagebrush landscape beneath Fossil Butte. Over 300 fossils are on exhibit.
The moon rises just to the right of snow-covered Fossil Butte.
Fossil Butte is the most noticeable landmark of the park and where the monument got its name.

Activities

  • Hiking
  • Junior Ranger Program
  • Wildlife Watching
  • Birdwatching
  • Museum Exhibits
  • Shopping
  • Bookstore and Park Store