The highest suspension bridge in the world is over the Royal Gorge near Canon City, Colorado. The Royal Gorge Bridge spans the Arkansas River at a height of 1,053 feet.
•
The Dwight Eisenhower Memorial Tunnel between Clear Creek & Summit counties in Colorado is the highest auto tunnel in the world. Bored at an elevation of 11,000 feet under the Continental Divide it is 8,960 feet long and the average daily traffic exceeds
•
The average snowfall in the Boulder area is 83.3 inches per year.