Radomir (Bulgarian: Радомир, Greek: Καλαμπάκα, Kalabaka) is a mountain on the Bulgarian–Greek border. At 2,031 metres (6,663 ft) it is the highest peak in the Belasica (Greek: Béles or Kerkíni) range. It is also known by its earlier name Kalabak.
The peak was named after the Bulgarian Emperor Gavril Radomir who took part in the battle of Kleidion in the Belasitsa mountains.
Radomir is located 9 kilometres (5.6 mi) south-west of Petrich, the nearest town on the Bulgarian side.