The Sulzfluh is a mountain in the Rätikon range of the Alps , located on the border between Austria and Switzerland . The closest locality is St. Antönien , on the southern side.

It is well known by climbers and has a Via ferrata on the southern, Swiss face, in Graubünden. There are a total of six known caves into the limestone mountain, with lengths between 800 and 3000 or more yards, with all entrances on the Eastern side, in Switzerland.

The eastern side has a mountain path of grade T4, allowing non-climbers to reach the 2817 metre summit.