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

Tourists have been caught on camera getting too close to bison, wolves, and bears. Approaching wild animals can cause them to ...

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

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

Wolf 1478F could have become the Junction Butte pack alpha, experts say.

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 ...

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

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

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

Another wolf from Yellowstone National Park's famous Junction Butte Pack killed in Montana is being investigated as a ...

Yellowstone National Park is used to rule-breakers, but usually it's the tourists pushing their luck, not one of their own employees.