<human>:  When was the Rocky Mountain National Park established?
<bot>: The Rocky Mountain National Park was established in 1915. It is located in the U.S. state of Colorado. The park covers an area of 2,190 square miles (5,600 km2) and has a population of about 8,000 people. The park is located in the mountains of the Front Range of the Rocky Mountains, and contains a number of lakes and streams. The park is known for its scenery, wildlife, and hiking trails.