Eschnerberg, also Eschner Berg, Schellenberg, (especially used in the Austrian village of Feldkirch) is 698 m high (Klocker close to Hinterschellenberg) mountain of seven peaks in the Rhine Valley,[1] on the borderline of Liechtenstein and the Austrian state of Vorarlberg, close to Feldkirch.

Settlements on the mountain include Eschen, Mauren, Gamprin, Ruggell and Schellenberg on the Liechtenstein side and the minor districts of Feldkirch Tosters and Fresch (Nofels) on the Austrian side.

For though this classification is orographically and geographically correct, it is classified as part of the Rätikon by the AVE (1984), due to its location south to the River Ill.

This mountain was one of the earliest settled places in Rhine valley (Rössen culture, since 4400 ACN [Neolitics]), artefacts were found in the archeological site of Borscht, close to Schellenberg.

The equivocation was discovered by the archeologe Jakob Bill in 1980, who additionally found out that they were named the other way round on historical maps and chronicles, also stating that both castles were ruins.