GM4O 40+ km

The route runs through four municipalities: Bohinj, Cerkno, Tolmin and Železniki. The participants run on old 'military mulatieres' and mountain trails along the slopes of Črna prsti and Porezen. The trail starts in Podbrdo (521 m above sea level), in the old village center. First part of the route takes you from Podbrdo to Petrovo Brdo all the way up until you reach homestead Hoba. There you follow the road below the house, and continues on beautiful military muletiere track under Kup, where the first snack station is located. The trail takes you further to Kovce (1230 m above sea level). From here, the it continues via Vrh Bača (1270 m above sea level) to Kobla (1498 m above sea level). From Kobla, the route descends to the mountain Kal (1362 m above sea level), and from here to the saddle Čez Suha (1760 m above sea level), just below the peak of Črna Prst. Čez Suho is the highest point of the marathon. This is followed by long descent (950 m altitude difference) along the marked path over the saddle of Kalarsko Brdo (985 m a.s.l.) to the village Kal (817 m a.s.l.). Next, the path leads us on the asphalted road to the village Stržišče. Immediately after the snack station in the village, we descend even more across the meadows to the village Znojile (in front of the village is 1 km of asphalted road). This is followed by three kilometers of easy run, to the village of Obloke (620 m above sea level), and then to Hudajužna (361 m above sea level),the lowest point of the marathon.

Last part of the trail run starts with a long and demanding ascent (6.5 km, 1230 m of height difference) over Žetlc, Rovt, Durnik, Robija and Prehod to the hut under the peak of Porezen. From Porezen (1636 m a.s.l.) we descend on Slovenska planinska transversala route over Trtniška planina past Robar back to the finish line, in Podbrdo.