Ytstenut Peak () is the northeasternmost peak in the Borg Massif, in Queen Maud Land. It was mapped by Norwegian cartographers from surveys and air photos by the Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949–1952) led by John Schjelderup Giæver and the Norwegian expedition (1958–59). Its name, Ytstenut, means "outermost peak".
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