Can anyone recommend a place in the Denver area to rent a road bike for a few days? My wife will be attending a professional conference in Denver in mid-July, and we thought it would be a great summer vacation for the whole family to spend about a week in the area. I'd really like to try riding a bike up a mountain, or at least see how high up I can get. I can battle the winds of Illinois well enough, and I'd like to see how I do against gravity. What are some good rides in the area?

Thanks!