- Rila - the highest mountain range in Bulgaria, with Musala (2,925 m) being the highest peak in the country.
- Pirin - the second highest mountain range in Bulgaria, with Vihren (2,914 m) being its highest peak.
- Stara Planina - also known as the Balkan Mountains, they stretch from the Serbian border to the Black Sea.
- Rhodope Mountains - located in southern Bulgaria, they extend into Greece and Turkey.
- Osogovo Mountains - located in western Bulgaria, they form a natural border with North Macedonia.
- Vitosha - a mountain located near the capital city Sofia.
