Trivia: Which of these is true of the petroglyph-covered Nine Mile Canyon?
It’s underwater
It’s actually over 40 miles long
It was once a nuclear shelter
It was used as an Olympic venue
The correct answer is It’s actually over 40 miles long
So why is this answer correct? : In terms of size, Nine Mile Canyon adheres to the philosophy of “underpromise, overdeliver.” The canyon is actually closer to 46 miles long, and it features some of the most stunning petroglyphs in the western U.S. The canyon cuts through the Book Cliffs, located about three hours outside Salt Lake City.