This photograph of Grinnell Glacier was taken in the summer of 1993. The steep headwall is evident behind the glacier. The glacier is covered with quite a bit of rock debris. The large solitary rock on top of the glacier in the left third of the photo is approximately 6-9 feet high. A large proglacial lake occupies the foreground of the photo. In the photo, we are looking towards the southwest. The location the photo was taken from is shown by the camera on the map. Grinnell Glacier is considerably larger on the map than in the photograph, thus these two images do not match perfectly. The map was published in 1968, while the photo was taken in 1993. In the intervening 25 years, Grinnell Glacier has retreated significantly. The photo was taken standing on rock debris, not from on the glacier as indicated on the map. On the topographic map, the steep headwall is shown by the close spacing of the brown contour lines. Contour lines revealing the topography of the land surface are brown, while contour lines showing the topography of the glacier surface are blue.