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Yellowstone National Park Stunning views of Minerva Terrace are located at Mammoth Hot Springs.
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Yellowstone National Park
Required Ranger Contacts

You are required to notify the district ranger in charge of your work area/s ONE WEEK in advance of your trip via the Researcher Check-In webpage. If you have trouble completing the required check-in, call the Research Permit Office at (307) 344-2234.

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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: December 19, 2011 at 09:55 MST