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Yellowstone National ParkVisitors enjoy a stroll along a boardwalk near a thermal feature.
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Yellowstone National Park
Norris Area Trip Planner
Lake Trout Illustration  

Did You Know?
Lake trout are an invasive species of fish that is decimating the native cutthroat trout population in Yellowstone Lake.

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Last Updated: September 17, 2007 at 10:30 EST