Rauhhorn, Mountain summit in Allgäu Alps, Germany and Austria

Rauhhorn is a 2,240 m summit on the Germany–Austria border in the Allgäu Alps, southwest of the Gaishorn and south of the Geiseck. Its jagged rock ridge falls away steeply to the east and west, and the Kugelhorn lies further south along the same crest. Fixed ropes secure parts of the north and south ascents.

Rauhhorn was first climbed in 1854 by Thaddäus Sendtner. Its northeast face was first ascended in 1962 and was repeated six times that year, but the route fell into obscurity after 1970.

The name Rauhhorn, also written Rauhorn, comes from the German "rauh" for rough, referring to the jagged rock ridge. The peak lies on the border between Bavaria and Tyrol, near Tannheim and Bad Hindelang. In winter ski mountaineers use the mountain, with descents to the Willersalpe and the Vilsalpsee, though most tours stop at the start of the rocky north ridge.

Climbing the summit requires basic rock climbing skills, as steel cables secure longer sections of the route. Sturdy footwear and climbing gear are necessary, and it is wise to check weather conditions before you go.

The summit ranks among the highest peaks in the Vilsalpsee mountain range and regularly attracts experienced climbers. Many visitors overlook the fossils and geological features visible in the dolomite rocks during the climb.