If you have the time, as others have written, Deckers, 11-Mile and Waterton Canyons are great places to go to within an hour or two drive of Denver. However, if you want to try some place after work, go to Bear Creek in Morrison. You live in a great place to fish there. I went there over the lunch hour today and caught 3 and missed 3 or 4, all in about 20 minutes. Its a lot of pot hole fishing, so move around looking for nice runs about 1-2 ft deep. You won't find very many very big ones in Bear Creek, but it is fishing.