The grooves in this photograph were created when Sperry Glacier was larger than it is today. As Sperry Glacier flowed across the underlying bedrock, numerous particles (sand, gravel, rocks) abraded and scraped away the underlying bedrock creating these grooves. Some of these grooves currently contain water and appear as elongate lakes. The photo was taken where the camera is located on the topographic map. In this photo, we are looking towards the northwest. Just past the end of the grooves we can see some sandy-looking hills or mounds. These are part of an end moraine. Off in the distance, we see some mountain peaks in the photo. These peaks are off the section of topographic map shown here. Sperry Glacier, which shows on the map, is out of the photo, off to the lower right. On the topographic map, north is towards the top of the map. Sperry Glacier is shown in white with blue contour lines. Some of the lakes in the photo appear on the map in blue. The grooves not containing water are shown by the bends in the contour lines just beyond (northwest of) the edge of the glacier. In order for us to see the falls labeled on the map and Avalanche Lake at the base of the falls, we would have to walk out to the end moraines, over the top of the moraines, and then we could see the steep drop-off where the falls are located.