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Public Domain Image: Ansel Adams, NPS
Rocky Mountain National Park, established on this date in 1915, comprises more than a quarter million acres astride the Continental Divide in Colorado. It is mostly a high altitude park, with five dozen peaks rising more than twelve thousand feet above sea level. Forests clothe the lower slopes, but higher elevations give way to tundra. The enormous elevation differences mean there are niches for many kinds of plants and animals; elk, bighorn sheep, and smaller creatures like marmot and pika all have a place here.