This is the standard and best-known route on Huascarán and is the line most commonly described in guidebooks. It is a high-altitude snow and glacier climb rather than a technical rock route, but it is serious because of objective hazards. Crevasses, avalanche danger, and especially serac fall are the main concerns on the lower and middle glacier sections. The route is usually climbed with one or more high camps because of the mountain’s altitude. Conditions can change quickly, and route-finding on the glacier is important. The summit day is long and strenuous, with cold temperatures and exposure throughout.