When are you planning on your visit? Co.Springs has some good riding close by. Rampart Range and Woodland Park area are within an hour drive. Both have large network of single track mountain trails. Most popular MX track, Aztec is in the Springs and hold Wed. night races and quite a few Sun races throughout the season. Depending on your, and my, schedule I may be able to hook up and show you around. I'm in Denver, 1 hr north, but Rampart is in between, and a blast to spend a day riding at. You would need a Co. OHV registration and a spark arrestor. Here are a few links to check out.
http://rampartrange.org/
http://www.aztecraceway.com/az/