If you want to catch some black bullheads (only getting to perch size), Id say go to Shady Lane Pond in Kalispell. If your trying to target channel cats, I would say try where the Marias River dumps into the Missouri near Loma. Its a bit of a drive away if your living in western MT. Fishin for these cats is done best in Mid summer. You would be wasting your time if you tried during the winter.