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Rocky Mountain National Park a photo of a hiker with Longs Peak in the background
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Rocky Mountain National Park
Cumulus Clouds
a photo of cumulus clouds
Photo courtesy of Rocky Mountain National Park.
Cumulus clouds result from unstable rising air masses.

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a photo of human tracks in snow and mist

Did You Know?
Rocky Mountain National Park is open 24 hours a day, 365 days a year. The visitor centers are open less often.
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Last Updated: July 21, 2007 at 10:44 MST