Trail Ridge Road
Trail Ridge Road connects both sides of the Continental Divide. It was completed in 1932 and replaced the Old Fall River Road built in the 1920s. The old highway is one way only going up but is currently closed due to massive flooding in 2013. Trail Ridge is still the highest continuous highway in the United States with 11 miles above 11,000 feet and four miles above 12,000 feet. Great care was taken to avoid damaging the environment as evidenced by the protective measures taken at Rock Cut. It was completed on time and under budget but stll cost $34,000 per mile.