John Colter
John Colter (born around 1770–1775 – died May 7, 1812 or November 22, 1813) was a member of the Lewis and Clark Expedition from 1804 to 1806. Colter is known for being the first person who was not a Native American to visit the area that is now Yellowstone National Park. He was also the first to see the Teton Mountain Range. He explored by himself for months, and is one of the first mountain men.