Mosbytoppane, Summit in Bouvet Island, Norway

Mosbytoppane is a pair of crags southwest of the caldera on Bouvetøya. The taller one is a snow-covered peak 670 metres above sea level, 1.3 kilometres northeast of Norvegiaodden. The two rock points rise from the volcanic island's western side in the South Atlantic.

The peak was surveyed and documented during a Norwegian expedition led by Captain Harald Horntvedt between 1927 and 1928. This scientific mission explored and recorded the geological features of the remote island.

The name honours Hakon Mosby, the oceanographer and meteorologist who was one of only two scientists on the First Norvegia Expedition under Captain Harald Horntvedt in 1927–28, the same expedition that charted the crags.

Mosbytoppane lies on Bouvetøya, an uninhabited Norwegian dependency in the South Atlantic with no harbour, airstrip or landing facilities; reaching the island depends on weather and sea conditions. The crags stand 1.3 km northeast of Norvegiaodden, southwest of the caldera, and the higher one is snow-covered. Landing and fieldwork require permission from Norwegian authorities and full expedition logistics.

The two crags lie 1.3 km northeast of Norvegiaodden, the cape where the First Norvegia Expedition landed in 1927–28. The higher, snow-covered crag rises 670 m, and the pair sits southwest of the island's caldera rim.