Ruen (mountain)

Ruen (Bulgarian and Macedonian: Руен ) is the highest peak of the Osogovo range, standing at 2,252 m. The peak is situated on the border between Bulgaria (Kyustendil Province) and North Macedonia (Makedonska Kamenica Municipality). It is formed by granite and metamorphic schists and is covered with Alpine meadow grasslands.

Ruen is included in the 100 Tourist Sites of Bulgaria under No. 27. The main starting points for climbing are Osogovo hut, Three Beeches hotel and the village of Gyueshevo.

Two right tributaries of the river Struma spring from the Bulgarian side of Ruen — the Sovolyanska Bistritsa at 1.2 km southeast of the summit and the Eleshnitsa at 400 m southwest of it.