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Yellowstone National ParkAerial photo of wolf pack in snow.
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Yellowstone National Park
Mammoth Area Trip Planner
Summer Crowd at Old Faithful.  

Did You Know?
At peak summer levels, 3,500 employees work for Yellowstone National Park concessioners and about 800 work for the park.

Last Updated: September 01, 2009 at 15:35 EST