The first winds through the Amphitheater Mountains, cresting at Maclaren Summit, at the second highest road in Alaska. The road then drops down to the Maclaren River Valley with fine views north to Maclaren Glacier. After crossing the Maclaren River, the road winds through the geologically mysterious Crazy Notch and then along the toe of the Denali Clearwater Mountains to the Susitna River. After crossing the Susitna River the road extends across the glaciers outwash plains to the Nenana River, and then down the Nenana River to Cantwell on the George Parks Highway (Alaska #3).