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Yellowstone National ParkJuvenile Bighorn Sheep casually amble along a precipice near Tower Falls.
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Yellowstone National Park
Lewis Lake Campground
 
 
National Park Service Ranger Hat and 2009 Adventure Logo
Ranger Adventure Hikes
Take a hike in Yellowstone's wilderness with a NPS ranger
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Mammoth Terraces.
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Roosevelt Arch at Yellowstone's North Entrance  

Did You Know?
The Roosevelt Arch is located at the North Entrance to Yellowstone National Park. The cornerstone of the arch was laid by President Theodore Roosevelt.

Last Updated: June 12, 2009 at 11:39 EST