Slettefjellet ({{coord|71|45|S|6|55|E|display=inline,title}}) is a peak 1 nautical mile (1.9 km) north of Gessner Peak at the northeast end of the Muhlig-Hofmann Mountains, Queen Maud Land. Plotted from surveys and air photos by the Norwegian Antarctic Expedition (1956–60) and named Slettefjellet (the smooth peak).