Good for you!
Colorado is awesome, for sure. I live and work in Westminster, and there are TONS of awesome trails out there, and if you go a few miles west (Coal Creek Canyon) you get tons of unused mountain trails as well.
I can even ride my bike from my house to work (about 2.5-3 miles each way), and am only on a road for about 2-3 minutes. After crossing a main street, a trail goes all the way back to my office!
Fantastic stuff. What part of Colorado?