The Sustenhorn is a 3,502-metre-high (11,490 ft) mountain in the Uri Alps, located on the border between the cantons of Bern and Uri.

It overlooks Susten Pass from the south.

On the west side (Bern) lies the Stein Glacier and on the east side (Uri) lies the smaller Flachensteinfirn.

It was climbed for the first time in 1851 by a team that took the route from Innertkirchen[2]

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