Anderson played a significant role in the preservation and development of the Yellowstone region.

Eight species and subspecies of trout, including a few found only in the Yellowstone region exist as well.

The report said that the biggest threat to the Yellowstone region was the "fragmentation of habitat."

It is an occasional visitor to these habitats in the Yellowstone region.

Native Americans have lived in the Yellowstone region for at least 11,000 years.

Hayden, while not the only person to have thought of creating a park in the Yellowstone region, was the park's first and most enthusiastic advocate.

Colter is the first white man known to have visited both the Yellowstone region and the forest, which he did between 1807 and 1808.

The prescribed natural fire policy appeared to be an effective way to manage fires, especially in the Yellowstone region.

He was among the first white men to see the geysers and other natural wonders of the Yellowstone region.

Cooke was interested in the potential of the Yellowstone region to attract railroad business.