Inside Yellowstone

President Theodore Roosevelt laid the cornerstone of the famous arch that stands at the park's North Entrance. Learn more about the history of the arch in this short video.

There are several factors that lead these springs to form spectacular terraces that are always changing. Park Ranger Beth Taylor will explain how the terraces are built in this short video.

Initially congress established the Yellowstone National Park without allocating funds to protect it. In order to keep the park safe from poachers, miners, and squatters, the army was brought in and they established a fort at Mammoth Hot Springs.

The Mammoth Hoodoos are travertine limestone deposits left by ancient hot springs. They broke away from Terrace Mountain and came to lie in a jumbled heap that looks as if it were strewn about by giants.

Golden Gate was named for the golden rocks that line the walls of the canyon. It has been used as a passage to the rest of the park by visitors entering through our oldest entrance, the North Entrance.

Roaring Mountain's steam vents can now be heard to hiss at the visitors who stop to see them. Changes in Yellowstone's features are commonplace. When you visit, stop to listen, as Roaring Mountain might very well ROAR once again.

Norris Geyser Basin, named after Yellowstone's first Superintendent, contains the hottest, oldest, and most acidic thermal features in the park. It is also the thermal area that changes most often. If you are interested in learning more about the dynamic nature of Norris, this video is for you.

Visitors break through the thin crust of rock and burn their legs in boiling water below far too often. They also approach wildlife too closely and we have injuries from elk and bison encounters every year. Learn more about the dangers you face when visiting Yellowstone, and how to avoid them, in this short film.

Legend says a discussion around a campfire below this mountain led to the establishment of the first national park in the world.

A surprising amount of life exists in the geyser basins of Yellowstone. Thermophiles thrive in the harsh conditions of hot springs and are the subject of ongoing research.