America's Aquarium in Stone

Some of the world's best preserved fossils are found in the flat-topped ridges of southwestern Wyoming's cold sagebrush desert. Fossilized fishes, insects, plants, reptiles, birds, and mammals are exceptional for their abundance, variety, and detail of preservation. Most remarkable is the story they tell of ancient life in the warm, wet environment in and around a freshwater lake. Read More

Diplomystus dentatus, an ancient herring fish

Fossil Exhibits

A variety of fossil fishes, insects, plants, reptiles, birds and mammals from ancient Fossil Lake are displayed in the visitor center.

hiker looking at landscape from Cundick Ridge overlook

Hiking Trails

Experience the geology, wildlife, scenery, and wide open spaces by hiking the interpretive trails, dirt roads or taking the scenic drive.

Cloudy sky and rain falling on the butte and the sagebrush lowlands.

Current Conditions at Fossil Butte

As you plan your visit, be sure to check out the current conditions at Fossil Butte National Monument.

visitor looking for fossils during program

Ranger Led Programs

We offer a variety of ranger programs during in the summer months including fossil preparation demonstrations and drop in programs.

student measuring leaf for leafy thermometers and rain gauges activity

Curriculum Materials for Teachers

Teachers, have fun with these hands-on curriculum materials designed for your classroom.

well preserved fossil bird head

Fossil Photo Gallery

Fossils are windows into the past. Check out the incredibly well preserved fossils from the Green River Formation.

visitor center in snow covered landscape

Scenic Photo Gallery

The sagebrush steppe is a land of unique beauty. Here are some favorite scenes.

Last updated: April 21, 2022

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Contact Info

Mailing Address:

P.O. Box 592
Kemmerer , WY 83101


307 877-4455

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