Breitenberg, Mountain summit in Tannheim Mountains, Germany.

The Breitenberg is an 1838 m high mountain in the Bavarian part of the Tannheim Mountains, in the municipality of Pfronten, Ostallgäu district. It consists largely of Hauptdolomit limestone. Its notch height is at least 198 m and its dominance 1.2 km, with the Aggenstein as reference mountain. A cable car from Pfronten runs to about 1501 m, and the managed Ostlerhütte inn stands near the summit.

The Breitenberg lies in the Bavarian part of the Tannheim Mountains, in the municipality of Pfronten. Its 2005-metre Breitenbergbahn cable car, built in 1993, rises 656 metres from a valley station at 845 metres to a top station at about 1501 metres. The Hochalpbahn chairlift, built by Leitner in 2004, runs 784 metres to 1677 metres. The Ostlerhütte inn stands near the summit.

The Ostlerhütte, a serviced mountain inn, stands at the summit and is run as a Berggasthof; the Hochalphütte below the Hochalpbahn valley station at 1510 m is also serviced. The Ostallgäuer Gleitschirmflieger e. V. is the largest local paragliding club, and its website has question-and-answer pages for visiting pilots and non-pilots.

The Breitenbergbahn, a 4-seater gondola built in 1993, runs 2005 metres from its valley station at 845 m to a top station at about 1501 m. From there the Hochalpbahn chairlift, built by Leitner in 2004, continues 784 metres to 1677 m. The Ostlerhütte inn stands by the summit, and the Hochalphütte at 1510 m below the chairlift's valley station is also served with food.

The summit station of the Breitenbergbahn, at about 1501 m, carries the Pfronten transmitter, a fill-in site for Bavarian public radio, Antenne Bayern and Deutschlandfunk that serves Pfronten, Füssen and Schwangau. The 2005 m gondola lift, built in 1993, climbs 656 m from its valley station at 845 m.