National park, north-central Colorado, U.S. Established in 1915 and enclosing part of the Front Range of the Rocky Mountains , the park has an area of 262,191 acres (106,105 hectares).
It contains many peaks exceeding 10,000 ft (3,000 m), including Longs Peak (14,255 ft [4,345 m]), as well as broad valleys and alpine lakes. The tundra in the park's high country is an island of Arctic vegetation surrounded by plants of lower latitudes. Animal life includes bighorn sheep, deer, mountain lions, and a variety of birds.