The Pretty Rocks landslide has affected the 92 mile road that runs through Denali National Park and Preserve since the 1960s. The rate at which the slide is moving has increased enough since 2016 to necessitate a longer term solution to keep the road passable at mile 45.5. These images depict how the road cuts into a softer vein of rock that is eroding rapidly, while the layers of firmer rock that surround it remain stable. Understanding the geologic features of this area are essential to rebuilding the road and keeping the Park accessible to visitors and Park staff alike.

These images are property of Denali National Park and Preserve, and cannot be duplicated.