Access the car park at the bottom of the Tourtemagne valley, 22 km past the village of Tourtemagne.
(S/E) At the end of the car park, turn left onto the path leading into the forest.
(1) At the fork, ignore the path on the right (which will be your return route) and turn left towards the Holustei Chapel.
(2) Turn right onto the Tourtemagne panoramic path, which overlooks the lakes. Stay on this path until you reach the mountain hut.
(3) Ignore the path on the right (which you’ll take on the way back) and turn left towards the mountain hut. Pass the hut and continue climbing towards Schöllijoch. You’ll come to a junction.
(4) Turn right towards Schöllijoch.
(5) Once at the pass, turn left onto the ridge path. Then, at a three-way junction about 350 m further on, turn right to climb up to the Inners Barrhorn.
(6) Continue left along the ridge path.
(7) Look out for the descent path on the left and carry on straight ahead to the Barrhorn (or Ussers Barrhorn).
(8) Once at the summit, turn back towards the three-way junction you spotted on the way up.
(7) Turn onto the path on the right.
(4) Follow the path back along the same route as on the way up to the mountain hut.
(3) Just past the refuge, leave the path on the right (the one you came up on) and continue straight on to take the path crossing an old moraine to the end of a former track
(9) Turn left onto a narrow track descending towards the Tourtemagne Lakes and following them along the right-hand bank. Then cross the Ruisseau de Tourtemagne further down (about 900 m downstream from the lake) to reach a track suitable for vehicles. Turn right.
(10) After two hairpin bends, leave the track by turning right to cross the Tourtemagne Stream again and head back into the forest.
(1) Back at the first junction of the day, keep left to return to the car park (S/E).