Keenan and Will riding on the glacial till and metamorphic bedrock of lower Meadow of the Grizzly.
Glaciovolcanic sediments and boulders form Slippery Salmon and the adjacent trails in Alice Lake.
Bryce and Micah riding glacially-sculpted slabs.
Evidence of glaciation visible on today’s trails. In the left image the surface of the rock has been polished almost completely smooth by ice. The semi-circular scars in the right photo were formed by rocks dragged across the granodiorite by a glacier.
These images illustrate the maximum thickness of the Cordilleran Ice Sheet. All material below approximately 2000m has been rounded by glaciers while the peaks that were above the ice sheet are jagged and pointed.