From Piscul Negru Tourist Complex, climb on the forest road on the side of the valley and walk past some sheepfolds. Further, the forest road is replaced by a footpath. Cross the brook and continue on the west bank through an area with dwarf mountain pines. Climb the first glacial threshold on the winding path and get to an area with alpine pastures. Reach the second threshold which is bordered by Caltun Wall to the southwest. Get to Caltun Lake above the third threshold, where the Mountain Rescue Hut is located. From here, you can continue to the west (red stripe trail) towards Negoiu Peak, or to the east towards Balea Lake Hut.