Roosevelt Arch

The Roosevelt Arch is the stone gateway at Yellowstone's North Entrance, on the edge of Gardiner, Montana. It is 52 feet high and built of hexagonal blocks of local columnar basalt, with curved basalt wings 12 feet high on either side. Above the opening is a line from the 1872 act that created the park: "For the Benefit and Enjoyment of the People". Over the pedestrian doors are two more panels, "Yellowstone National Park" and "Created by Act of Congress, March 1, 1872".

The arch went up in 1903, the year the Northern Pacific Railway finished its branch line to Gardiner. Construction ran from February 19 to August 15, 1903, under the supervision of the US Army, which then ran the park from Fort Yellowstone, and cost about $10,000. The idea is credited to Hiram Chittenden, the Army engineer building the park's roads, and the design is attributed to the architect Robert Reamer, though the records are not conclusive.

On April 24, 1903, President Theodore Roosevelt, on a tour of the park, laid the cornerstone. A time capsule inside it holds a Bible, a picture of Roosevelt, local newspapers and other items. The arch has carried his name ever since. Today it is a contributing structure in the North Entrance Road Historic District, listed on the National Register of Historic Places in 2002. After the June 2022 flood destroyed sections of the old entrance road along the Gardner River, the park rebuilt the Old Gardiner Road, an 1880s stagecoach route, as a paved road and opened it on October 30, 2022; it now serves as the way in from Gardiner.

The arch stands in Montana. Mammoth Hot Springs, the first major stop inside the park, is across the line in Wyoming. Visiting the arch is free, and you do not need a park pass to walk up to it from town. It is open at all hours, and early morning or evening light on the basalt is the best time for photos.

Gardiner is the only Yellowstone gateway with car access all year, so the arch can be seen in any season. Pair it with a walk along Park Street and, if you have a pass, the short drive up to Mammoth.