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.
Did You Know?
Prior to the establishment of the National Park Service, the U.S. Army protected Yellowstone between 1886 and 1918. Fort Yellowstone was established at Mammoth Hot Springs for that purpose.