The class II put in is located at the far end of the National Forest Road (coord 44 11.397, -71 07.795). From Route 302, turn onto Town Hall Road. Follow it up all the way into and past the National Forest Gate (3.35 miles), turn left 2.5 miles furthur on. You'll immediately pass over Slippery Brook (the main tributary of the river). Continue on another 3.35 miles (9.2 total), passing over the river, then to the end of the road and trailhead. The put-in is a short walk down the trail.