Photograph of river flowing along line of trees, showing partial view of mountain in background, Yellowstone National Park, Wyoming, [s.d.]. At the top of the image, part of a large branch hangs down into the foreground of the picture. In the foreground at center, a wide river is visible flowing to the right and into the background. Rocks can be seen protruding from the water's surface and stationed on the embankments. On either shore, large pine trees are visible. In the extreme background at center, part of a mountain slope can be seen ascending to the right. The rest of the mountain is obscured by the large trees.