- State: WY
- NPCA Region: Northern Rockies
- Est. Date: 1972
Air & Climate Data
View the Polluted Parks ReportVisibility
Moderate Concern
Health
Moderate Concern
Nature
Significant Concern
Climate
Significant Concern
You will find some of the world's best preserved fossils at the 50 million year old Green River Lake beds of Fossil Butte National Monument in Wyoming. If you want to get hands on, you can visit a fossil research quarry and assist park staff as they collect fossils.
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Blog Post
Where to Touch a Dinosaur, and Other Incredible National Park Fossil Sites
Cool creatures from the past and where to see them
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