
06/17/2025
Diversity is everywhere in YNP
Did you know the fossil record of Yellowstone is one of the most diverse in the National Park Service? It also spans more than 540 million years from the Cambrian to the Cenozoic eras!
Some of the best-known fossils in Yellowstone are the fossil forests of Specimen Ridge, where the remains of hundreds of 50-million-year-old trees stand exposed on a steep hillside, with trunks up to 8 feet in diameter and some more than 20 feet tall.
If you find a fossil while on a hike, remember to leave it as you found it! Collecting natural resources such as rocks, fossils, and antlers is illegal in the park.