This 85-acre lake in Winchendon averages eight feet in depth with a maximum depth of 15 feet. The shore is undeveloped because the area is part of the Birch Hill Flood Control Project under the jurisdiction of the U.S. Army Corps of Engineers. Adjacent to the north and east shores is a large camping area. Boats can be launched at the public gravel ramp located off Royalston Road on the western shore. Parking space is available for eight to ten vehicles. Note: outboard motors larger than 10 hp. are prohibited. Aquatic vegetation is scant, dominated by scattered clusters of lily pads in the shallower areas. The pond averages about 9.0 feet in transparency; the water is very light brown in color. Fish Populations: largemouth bass, chain pickerel and rainbow trout. A variety of panfish are present including white perch, yellow perch, black crappie, bluegills, pumpkinseeds, brown bullheads and yellow bullheads.
Lake Denison is a fairly small lake, one that can be fished from shore or boat quite effectively and easily. Shore fishing for trout should prove successful in late spring, close to the time of stocking. However, once warmer temperatures arrive, these fish will seek the deeper, colder areas, which will probably necessitate fishing for them from a boat. Bass fishing should be interesting at this pond. Work the weedy areas and especially anything affording hiding cover to these structure-oriented fish. This lake is also a good spot to try for chain pickerel action.