Chumerna, Mountain summit in Sliven Province, Bulgaria.

Chumerna is a summit in the Eleno-Tvardishki section of the Central Stara Planina, reaching 1536 m. It lies east of the Tvardishki Pass. Its southern slopes are steep and long, cut by deep river valleys, while the northern slopes are short and gentle, covered with beech forests. The peak is built of Triassic conglomerates, sandstones and marls, with dolomite deposits.

Chumerna lies in the Eleno-Tvardishki section of the central Stara Planina, east of the Tvardishki Pass. The sources record no historical events, settlements or Thracian use for the summit; they describe only its geology and terrain. Its rocks are Triassic conglomerates, sandstones and marls, with a dolomite deposit, and the Chumerna hut stands nearby.

The peak gives its name to the Chumerna hut standing nearby, the usual base for walks in this part of the Elena-Tvardishki section of the Central Balkan range. The mountain is also known under the names Czumerna and Tjumerna in Polish, Dutch and Swedish sources.

Chumerna lies east of the Tvardishki Pass in the Eleno-Tvardishki section of the Central Balkan Mountains, and a mountain hut, Chumerna, stands nearby. The southern slopes are steep and cut by deep river valleys, while the northern slopes are short and gentle, covered with beech forest. Approach from the pass side rather than the valley side.

Chumerna is built from Triassic conglomerates, sandstones and marls, and dolomite deposits occur here. Its higher parts carry rankers, while brown mountain-forest soils cover the slopes. The Chumerna hut stands nearby, giving walkers a base below the summit.