Grand Canyon of the Yellowstone

The Grand Canyon of the Yellowstone is the primary geologic feature in the Canyon District. It is roughly 20 miles long, measured from the Upper Falls to the Tower Fall area. Depth is 800 to 1,200 ft.; width is 1,500 to 4,000 ft. The canyon as we know it today is a very recent geologic feature. The present canyon is no more than 10,000 to 14,000 years old, although there has probably been a canyon in this location for a much longer period.