A field trip was carried out in summer 2017 with emphasis on mountain peak sites in six mountain ranges of North Macedonia: Kajmakčalan, Korab, Kožuf, Mokra Planina, Pelister, and Šar Planina. The fieldwork resulted in an output of c. 1200 samples. 419 taxa were identified, including 123 lichens, 17 lichenicolous fungi, and one non-lichenized fungus that are all new for the country. Sixteen lichens are new for the Balkan Peninsula: Allocetraria madreporiformis, Aspicilia supertegens, Caloplaca tetraspora, Epilichen scabrosus, Euopsis pulvinata, Kiliasia nordlandica, Koerberiella wimmeriana, Lecanora viridiatra, Lecidea speirodes, Miriquidica atrofulva, Placynthium dolichoterum, Protoblastenia aurata, P. terricola, Pyrenopsis sanguinea, Sporodictyon cruentum, Verrucaria transfugiens, and three lichenicolous fungi: Arthonia circinata, A. stereocaulina and Cercidospora melanophthalmae. An updated bibliography is presented. Key words: Balkan Peninsula, biodiversity, subalpine and alpine belts, mountain peak sites.