107.4 miles: 1 hours, 35 minutes
The Adirondack forest lines the road and stretches over the tops of the mountains along much of I-87, creating a spectacular fall display. South of Plattsburgh, the route crosses the Saranac River, popular for kayaking and canoeing. A slow-moving section of the Ausable River flows under the interstate toward the Ausable Chasm. South of Keeseville, mountains begin to emerge, forming a stately backdrop to Butternut Pond.