Trail Ridge Road is the highest continuous paved road in America. It spans Rocky Mountain National Park from Grand Lake in the west, to Estes Park in the east, a 48 mile journey through the park. It's highest point is 12,183 feet, but even more amazing is that it remains above treeline (near 11,550') for 11 miles!
RMNP, you should go if you get the chance. A drive on Trail Ridge Road would be a memorable experience. And if you get to experience it on a bike, it will be a day you'll never forget!