Things can be pretty good...you should check on these sites and get a better opinion:
coloradofishing.net and coloradotrouthunters.com . Just cut and paste into your browser witht he appropriate www. in front.
In Littleton, you can flyfish a quarter mile from mainstreet and upstream on the Platte to Chatfield Reservoir and above the reservoir up Waterton canyon. Pretty tough fishing and slow but it's been my experience that if you want to take a short ride..45 minutes to and hour or so, you can get up near a town called Deckers. It is usually pretty good all year round.
Then if you get serious and want to drive a bit...underneath the IOnterstate 70 bridge in Silverthorne offers some of the best fishing..incredible...and you can park in the factory outlet parking lot!
But check into the sites I listed above and get help from a pro if you want to have a good experience.