Lost Creek Wilderness is a 119,790-acre wilderness in central Colorado within Pike National Forest, known for rounded granite domes, knobs, gorges, spires, and natural arches unlike the sharper alpine scenery elsewhere in the Rockies. Named for Lost Creek, a perennial stream that repeatedly disappears underground before joining Goose Creek, it lies within the Platte River Basin watershed. Its 16,798-acre Lost Creek Scenic Area, where the stream is said to vanish and return nine times or more, was established in 1963 and named a National Natural Landmark in 1966. Also called Lost Park, the area was one of the last refuges of the American bison in the United States and is now a major recreation destination.