The course starts at the Carpathia Guesthouse and after a short asphalted portion it turns right, towards Valea Izvorul (Izvorul Valley). The course ascends through a rocky canion, then arrives to a smoother area. From here, it winds by the stream, and at the end of the valley – where the road splits – the course turns right and starts a strong ascent. Arriving to the ridge, we reach the tourist route marked with a blue-line, on which we continue our way. After 13 km from the start the course starts to descend to the right and takes us to the end of Leșu lake (Coada Lacului Leșu). From here, after a short asphalted part of 500 m, we make a sharp u-turn and start our steep ascent on the opposite side of the valley.

The running course continues on the tourist route marked with a red-triangle, which we follow almost until the destination. After a very steep ascent, with a little detour, it worths to make a few minute stop at Piatra Bulzului (Bulzului Rock), from where we can see the lake and the neighboutring peaks. The route continues around the lake and after a long descent, after the canion of the Leșu stream, it gets back to the running course, from where we have 3 km to our destination.