This photo shows the exposure of the Mount Jackson Rhyolite Series vitrophyre at Gibbon River. Boulders of weathered, lichen-covered rock show how easy it is to overlook these new units. (Photo by Liv ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Richard Tollo, emeritus professor of ...

Yellowstone National Park remains the most visited park in the United States. Although the interest is great, millions of visitors can also hurt the park's well-being. We have seen several examples of ...

The breathtaking beauty of Yellowstone National Park and its stunning hydrothermal features may have you exclaim: "Hold on to your hats!" The U.S. Geological Survey asks you to take that literally.

Visitors can find this kind of discoloration in the iconic Morning Glory Pool. Today, it appears with a multicolored rim. An ...

Both geologists and everyday Americans continue to wonder about the volatility of the Yellowstone region. Could a major geologic event happen within our lifetime, and what would it mean if it did?

Geologists at Yellowstone National Park have pulled more than 300 lost hats from the famous hot springs. The headwear, estimated to be worth over $6,000, is among a range of items collected so far ...

28 July 2026 – 5 days for US$4,995* per person (*based on 2025 prices, subject to increase). Step into one of the most wildlife-rich landscapes in the continental US, the iconic Lamar valley of ...