Ottehallet Slope (-72.2°N -13°W) is an ice slope between Straumsvola Mountain and Brekkerista Ridge in the Sverdrup Mountains of Queen Maud Land. Mapped by Norwegian cartographers from surveys and air photos by Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949–52) and air photos by the Norwegian expedition (1958–59) and named Ottehallet (the early-morning slope).