This is the standard and most frequently climbed route on Mount Rainier. It is a glacier climb with extensive travel on snow and ice, usually requiring rope teams, crampons, and glacier travel skills. The route commonly changes from year to year because crevasses, seracs, and the position of the cleaver shift with conditions. Objective hazards include crevasses, rockfall, icefall, and rapidly changing weather. Most parties climb it over one or two days from Camp Muir, with a very early summit push. It is generally considered the least technical of the major summit routes, but it is still a serious alpine objective.