Clouds rapidly slide down the mountains and rain looks imminent.
In this photo, just north of the park entrance, the river flows north, or to the right. The black bridge in the background is a railroad bridge. After the rafts pass here, I head back north, hoping I can get photos of the rafts as they pass near a rail tunnel. A raft passes the entrance to the first rail tunnel north of Denali National Park. This is on the opposite side of the Parks Highway from where the first photo was taken.