The largest stream in the municipality is the Breitach which originates in Baad and flows through all three villages of Mittelberg, Hirschegg and Riezlern.

The main mountains of Mittelberg include Elfer (2387 m) Bärenkopf (Allgäu Alps) (2083 m), Walmendingerhorn (1990 m), Grosser Widderstein (2536 m) and Zwölfer (2224 m).

[3] Although it is not an exclave in a strict sense (it is contiguous with the rest of Austria), its geographic position creates a special situation for inhabitants and visitors.

Since Austria joined the European Union (1995), the Schengen Agreement was ratified (1997), and the Euro was introduced (2002), this special status no longer applies.

[citation needed] Kindergartens: Mittelberg was the setting of "The Final Reich," one of the levels of Call of Duty: World War II: Nazi Zombies.