Gardiner is located in Park County 54 miles south of Livingston between Mammoth Hot Springs and Corwin Springs along US 89 on the banks of the the Yellowstone River near Yellowstone National Park.
Gardiner is the only year-round, drive-in entrance to the park. Roosevelt Arch has marked the North Entrance to Yellowstone since 1903, when President Theodore Roosevelt dedicated it before an estimated 5,000 spectators.