A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Millions of people head to Yellowstone National Park each year, making traffic through popular areas a major problem for the ...

A gray wolf was illegally shot and killed just north of Yellowstone National Park last month. According to wolf advocates, ...

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

New preliminary visitation numbers from the National Park Serviceshow Glacier and Yellowstone National Parks moving in different directions last year, despite ...

Rangers at Yellowstone National Park are reportedly trying to solve the mystery of what happened to a well-known female wolf ...

The story of wolves in Yellowstone National Park is one of the most successful—and scrutinized—wildlife restoration projects ...

The following is a news release from Yellowstone National Park. MAMMOTH HOT SPRINGS, Wyo. — Starting this year, Yellowstone ...

Yellowstone National Park is extending the fishing season on three rivers in the park. That includes the Firehole River, ...

Tourists have been caught on camera getting too close to bison, wolves, and bears. Approaching wild animals can cause them to get stressed and lead to dangerous encounters. Keeping your distance helps ...

Yellowstone’s "secret" century-old Old Faithful stamp is available only by request and may be the last of its kind. Before Instagram and ...