Grosses Fiescherhorn is a mountain peak of the Bernese Alps, located on the border between the cantons of Bern and ValaisValais, halfway between the Mönch and the Finsteraarhorn. At above sea level, its summit culminates over the whole Fiescherhorn massif (), which is also composed of the slightly lower Hinteres Fiescherhorn () to the south and Kleines Fiescherhorn (also called Ochs aka ox, ) to the east. From the north both are well hidden behind other mountain peaks and can only been seen from Isch in Grindelwald (1,095 m). The mountain is shared between the municipalities of Grindelwald and Fieschertal.