The history of Rocky Mountain National Park began when Paleo-Indians traveled along what is now Trail Ridge Road to hunt and forage for food.[11][12] Ute and Arapaho people subsequently hunted and camped in the area.[13][14] In 1820, the Long Expedition, led by Stephen H. Long for whom Longs Peak was named, approached the Rockies via the Platte River.[15][16] Settlers began arriving in the mid-1800s,[17] displacing the Native Americans who mostly left the area voluntarily by 1860,[18] while others were removed to reservations by 1878.[14]
