Start at the South Mineral Campground and follow the Ice Lakes Basin Trail into the eastern part of the lower basin. From here, leave the main trail and climb a fainter trail northwest into Island Lake Basin. Once in Island Lake Basin climb to the saddle between US Grant and Pt 13,520. You are now on the southwest ridge, and the climbing of this peak is about to begin.
Once at the saddle, continue climbing the ridge without much difficulty until you reach a 20 foot cliff that leads to a ledge above. This pitch is the crux of the route. Once above the cliff, follow the ledge east for about 200 feet until you reach the south face. From this point it is a relatively easy scramble up to the summit.
An ice axe could be of use, due to the large amount of snow that stays in the basin most of the year. Many people would feel more comfortable with a rope belay at certain points in the route, or with a rappel of the crux pitch.
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