The Southwest Ridge is a recognized alpine route on Weissmies and is more serious than the normal glacier route. It involves mixed terrain and typically requires more route-finding than the standard ascent. Conditions can vary significantly, with snow, ice, and loose rock all possible. The ridge is more exposed and committing than the normal route. It is suited to experienced alpinists comfortable with moderate mixed climbing in alpine conditions. Because of its character, it is less frequently climbed than the normal route.