Well, I can still shout, but that's about all at the moment. One of my favorite century routes in the mountains starts and finishes about 10 miles north of Kremmling, goes over Gore and Rabbit Ears Pass with a lunch stop in Steamboat Springs. Here's a map.
http://www.gmap-pedometer.com/?r=1817465
This also works well as a two day ride with over night in Steamboat for food, hot springs and beer.