Royal Gorge
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The Royal Gorge is a canyon of the Arkansas River located west of Cañon City, Colorado. The canyon begins at the mouth of Grape Creek, about 2 mi west of central Cañon City, and continues in a west-northwesterly direction for approximately 6 mi... Wikipedia
Depth: 1,250 feet (380 m)
Length: 6 miles (9.7 km)
Rivers: Arkansas River
Width: 50 feet (15 m) (base); 300 feet (91 m) (top)