Pella Crossing is right in your neck of the woods. Good fishing, a couple of ponds to choose from, and not usually packed like a lot of other lakes in the area. Its in Hygiene just west of Longmont.
Yep, Pella is full of alot of brands of fish. Your best bet is to drag your kayak or belly boat to the back side, usually a lucky time for sure.
Golden Ponds is ok, but gets fished a bit, no canoes allowed.
Macintosh has some hefty bass in it as well as Lagerman.
Union is good for wipers and you can wakeless boat there.
If you got kids, then Issac Walton pond has catfish, bass, crappie and they stock it with trout in april for the kids fishing derby.