A 3-D nautical wood map featuring the Colorado River and the Grand Canyon in Arizona. It measures 13.5" x 31". The Grand Canyon is 277 miles long, up to 18 miles wide, and attains a depth of over 6,093 feet. Grand Canyon National Park is one of the world's premier natural attractions, attracting about five million visitors per year. Points of interest include: The Grand Canyon is 277 miles long, up to 18 miles wide, and attains a depth of over 6,093 feet. Grand Canyon National Park is one of the world's premier natural attractions, attracting about five million visitors per year.