Ytstenut Peak () is the northeasternmost peak in the Borg Massif, in Queen Maud Land. 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 air photos by the Norwegian expedition (1958-59) and named Ytstenut (outermost peak).