Yellowstone National Park Facts
The park was first viewed by European or white people relatively late. The Rocky Mountain ranges which surround the park area, and its remoteness, are largely responsible for this. The first white man to visit the Yellowstone area was probably the famous mountain man and adventurer John Colter, who wandered throughout the Rocky Mountain area in 1807-1808 following completion of his participation in the Lewis and Clark expedition.
Yellowstone Park Frequently Asked Questions