From the ski area in Brighton take the Brighton Nature trail. Follow the trail alongside the creek until it joins the maintenance road for the ski lift. When the road makes a sharp turn to the left, the trail leaves the road and goes right to an overlook wher the trail divides. Follow the signs and go around the west side of Dog Lake on the old mining road. The first dump has the most magnetite and ludwigite. The second dump has very little but there are several small dumps up the hill from this point with magnetite, copper staining, garnet, etc.