Becco Alto d'Ischiator, Mountain summit on the Italian-French border, Maritime Alps, Piedmont, Italy

Becco Alto d'Ischiator is a 2998 m sharp summit in the Maritime Alps on the France-Italy border, south of Monte Tenibres. Three ridges leave the top: two form the state border and the watershed with the Tinée valley, the third divides it from the Piz valley. The mountain is made of biotitic and migmatitic gneiss of the Argentera crystalline massif, and from afar the peak resembles the Matterhorn.

The first documented ascent was made on 28 June 1890 by the Austrian mountaineer Ludwig Purtscheller. The summit lies on the border ridge between Italy and France, where the territories of Vinadio, Pietraporzio and Saint-Étienne-de-Tinée meet. The mountain is built of biotitic and migmatitic gneiss of the Argentera crystalline massif.

The Italian name likely comes from a pre-Latin root *ischia, meaning slippery place, and is pronounced with the stress on the final "o": Ischiatòr. In France the mountain is called Grand Cimon de Rabuons, after the Rabuons cirque and its large lake below, visible from the summit.

The ascent is technically challenging and requires mountaineering experience along with proper equipment. Visitors should check weather conditions in advance and prepare with local guidance or information.

From the summit, the large Rabuons lake and its cirque on the French side are clearly visible below, while the Italian side drops toward the Ischiator valley. Seen from a distance, the sharp peak resembles the Matterhorn. The summit is the meeting point of Vinadio, Pietraporzio and Saint-Étienne-de-Tinée.