Lake reflection in front of Mount Werner, Rocky Mountains, Colorado (Chris Celby)

Rocky Mountain National Park, Colorado (NPS)

Big Thompson River in Moraine Park, Rocky Mountain National Park, Colorado (Willard Clay/Photogs Choice/Getty)

Big Thompson River in Moraine Park, Rocky Mountain National Park, Colorado (Willard Clay/Photographers Choice)

Rocky Mountain National Park, Colorado (NPS)

Rocky Mountain National Park, Colorado (NPS)

Moraine Lake in Rocky Mountain National Park, Colorado (iStockphoto/Thinkstock)

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