Golden Gate Canyon, Natural canyon in Yellowstone National Park, US.

Golden Gate Canyon is a narrow gorge in Yellowstone National Park where Glen Creek flows northward between steep rock walls. The valley connects Mammoth Hot Springs to the southern sections of the park and descends significantly along its length.

A road was first built through the canyon between 1884 and 1885, replacing an earlier mountain route that was difficult to maintain. The new passage became essential for connecting the northern and southern sections of the park.

Lieutenant Dan Christie Kingman first recorded the name in his reports to the Departments of the Army and Interior, noting that park visitors already called the canyon and pass Golden Gate for the yellow hue of the surrounding rocks.

The Grand Loop Road crosses the canyon between Mammoth Hot Springs and the park's southern features, descending from Kingman Pass at 7,400 feet to just under 6,000 feet in under 3 miles. The road is narrow where it passes the cliff face at the Golden Gate viaduct, so expect tight curves and slow traffic rather than room to stop. Pull-outs are limited; plan to view Glen Creek and the yellow rock walls from designated parking areas.

The first road through the canyon in 1884–85 required a wooden trestle where a cliff face blocked grading. It was rebuilt in concrete in 1900 under Captain Hiram M. Chittenden, replaced when the road was widened in 1930–34, and replaced again in 1977.