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A summer storm breaks up revealing the twin summits of Mount Denali and the upper reaches of the Harper Icefall. The south summit, to the left, is the highest peak in North America at 20,310'.
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High thin clouds top the summit of Mount Denali in early summer. Early summer is peak climbing season on Denali, with most groups attempting the West Buttress route on the south side of the mountain.
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Lenticular clouds form as high winds scour the summit of Mount Denali in summer. Lenticular clouds form when stable, moist air flows over a mountain range.
