Cooney Reservoir Professional Review and Guide
"Cooney Reservoir is a heavily fished state recreation area. There are two public campgrounds at the reservoir, one on the west side and the other on the east. Besides camping facilities, there are public toilets, picnic areas, boat access sites, and beach areas for swimming. Since this reservoir is located near Billings, the largest metropolitan area in Montana, the summer season is fast becoming a potential recreation nightmare because of conflicts between water-skiers, swimmers, and anglers. FWP is working to resolve most of these problems before they reach the critical stage of having to restrict any one activity.
Facilities have been expanded and improved in recent years. Cooney Reservoir was once primarily a rainbow trout fishery, stocked annually by FWP with over 250,000 rainbow. But beginning in 1984, FWP annually introduced walleyes and reduced rainbow plants to 150,000 fish. Biologists hoped to create a two-tiered trout and walleye fishery and at the same time control the burgeoning population of suckers. Although the walleye are not reproducing on their own, some fish from the original stocking have grown to 16 pounds. While most non-angling recreationists use the reservoir heavily only during the summer, anglers ply their trade year-round."