The Geneva Spur, named Eperon des Genevois[2] and has also been called the Saddle Rib[3] is a geological feature on Mount Everest—it is a large rock buttress near the summits of Everest and Lhotse.

[4] The spur provides a route to the South Col, and is usually traversed by climbers heading for Lhotse or Everest summits.

[5] Lhotse climbers typically head southeast from Geneva Spur, and on to a couloir to ascend that summit.

[5] On the 1956 Swiss Everest–Lhotse Expedition, the spur was the location of the last high camp before Fritz Luchsinger and Ernst Reiss achieved the first known ascent of Lhotse summit, on 18 May 1956.

It is flanked on either side by two steep couloirs, which after fresh falls of snow become dangerously exposed to avalanches, but after dry spells turn to grooves of bare ice".