I've done quite a bit of bike commuting. In the late 90's, I'd go from the Arapaho ParkNRide out to Parker and Illif - very similar to the route you are looking at. Anyhow, for a commuting bike (especially in the summer) no need to over think it. With a commuter bike, reliable and simple is key.
Be on the look out for any 90s vintage MTB that has provisions for installing a rear rack and fenders. Most of them that you find will just need some cleaning, lubing and small adjustments to be good as new. Search string MTB or Mountain Bike.
You can swap out the knobbies for a thinner smoother tire, slap some puncture resistant tubes and gator liners for flat protection. Toss your clothes inside a wet dry bag, latch it to your rack and hit the road.
Ricardo Maestas - Bio Page
1999 LX 470, 1971 FJ-40
Last edited by RicardoJM; 03-19-2012 at 08:25 AM.