Golden Gate Canyon

Golden Gate Canyon is in the northwestern region of Yellowstone National Park in the U.S. state of Wyoming. Glen Creek flows north through the canyon en route to the Gardner River descending from 7,400 feet (2,300 m) at Kingman Pass to just under 6,000 feet (1,800 m) in less than 3 miles (4.8 km). The northern portion of the Grand Loop Road traverses the canyon, connecting Mammoth Hot Springs with park features to the south.^[2]

• http://en.wikipedia.org/wiki/Golden Gate Canyon