From hidden thermal hot spots to secret hiking trails, the park is packed with hidden wonders, and we are here to tell you ...

Yellowstone National Park Facts - Learn more about our 1st ... begin counterclockwise around the geyser towards the Firehole ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park ... near the Firehole River. Photograph by Michael ...

Firehole Canyon Drive stands out since it takes visitors past a waterfall and to a Yellowstone swimming ... stretch of the Firehole River. Unlike other places in the park, the river here runs ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park ... But along the Firehole River in the Upper ...

Sapphire Pool is one of our favorite blue water pools in Yellowstone National Park ... Keep an eye out on the Firehole River for River Otters as you cross the wooden bridge heading up to Biscuit ...

The canyon is anywhere from 800 to 1,200 feet deep and features multiple falls that cascade down the Yellowstone River, including ... Village area and one of the park's most popular hiking spots.

Some of Marler’s other publications, including “The story of Old Faithful,” “Studies of geysers and hot springs along the Firehole River, Yellowstone National Park, Wyoming,” and ...

Just the day before, a pack of wolves known as the Wapiti had found a large bull bison that was weak and injured. Based on its size, this big boy was near the end of its lifespan and the winter ...

Ranger naturalist George D. Marler monitoring of changes in hydrothermal activity in Yellowstone was useful in understanding the changes in hydrothermal activity following the August 1959 M7.3 Hebgen ...