We will be visiting Colorado in mid-July and are still determining our itinerary. We are thinking about maybe a few days in Colorado Springs (go up Pikes Peak, visit Garden of the Gods), a few days in Denver (go to the zoo, Natural Museum), and a few days somewhere else, like Telluride, Breckinridge or Aspen. We have two kids (ages 10 and 13), and we're interested in some moderate hiking as well as whitewater rafting. Any suggestions for the best places to go for these activities? Any other activities we should consider?