Union Reservoir in Longmont...off of 119 and County Line Road. its a fee area, but you have a good chance of catching some decent wipers there. guys catch them there bottom fishing with mussels, shrimp, and crayfish tails.
Barr Lake...in Brighton. its another fee area. i think the water is still high, but you should be able to fish the park side with no problems. a good catfish lakes at times...liver works well or shrimp or crawlers.
Chatfield Res.... a fee area also. what the heck, everything costs money these days. fish below the dam or near the marina, guys are catching walleyes there. thats where i would go right now...take some dark or glowing jigs and tip them with leeches or crawlers.
i assume you are bait fishing? if now try Rat L Traps, jigs, or jerk baits at all of these lakes.