Park in the Lerchenmatt car park, 1.7 km from Sewen church via Rue de Elbach, after a bridge over the Wagenstall stream.
(S/E) From the car park, continue for a few dozen metres along the Lerchenmatt road and turn right onto the Wagenstall path marked with a red triangle.
(1) Pass by a wooden bridge and then turn right uphill towards the waterfalls and Grand Langenberg. The climb is steep, but the waterfalls are well worth the effort.
(2) In front of the farmhouse inn, leave the red triangle markings and turn left onto the Grand Langenberg forest road.
(3) After 1.2 km, at the bend, leave the forest road on the right and take the steep path that turns to the left. (If this path is not passable, see practical information). 200 m further on, cross a carriage road and climb the path marked with a red cross towards "Wisskritt". Stay on the Red Cross trail until you reach the Wissgrut hilltop.
(4) Turn right towards the summit of Wissgrutt to enjoy the 360° panorama, then return south on the Red Rectangle marked trail (GR®®5) to the Wissgrut farmhouse inn. Further south, you will reach the summit of Tremont (Tremontkopf) and its beautiful beech trees. Descend into the forest for 500 metres, after a slight incline, under a cluster of large beech trees surrounded by small fir trees, you will arrive at a Y-junction.
(5) Leave theGR®®5, which continues to the left, and take the path on the right which leads after 150m to a path marked with a red triangle and to the Roche du Serpent.
(6) You will need to climb a few rocks to enjoy a panoramic view at the summit. Climb back down the rocks and take the path on the right, which rejoins theGR®®5Red Rectangle. Pass the Col sans Nom (Nameless Pass).
(7) At the Col du Hirtzelach, there are many intersecting paths. Continue on theGR®®5. When you leave the forest after the chicane barrier, you will enter the Lochberg stubble field. Below on the left, a construction site has replaced the Fennematt farm, and the Highland cows from the Lochberg farmhouse inn graze in the meadows.
(8) A path (a possible shortcut to reach (10) not always passable) descends to the left towards theGR®®531(Blue Rectangle). Continue to the right towards Lochberg Barrenkopf, where you will see the farm below. Continue to the Lochberg Pass and its oratory.
(9) Before the pass, turn left towards Fennmatt Lochberg. You will reach a crossroads.
(10) Take theGR®® 531 marked with a blue rectangle towards Sewen on the left.
(11) Stop at the source of the Doller on the left, then continue towards Fennematt.
(12) Before the building site, on the site of the demolished farmhouse, on the right near the Langlois Monument, a path marked with a red ring climbs towards Dolleren via Schlumpf. Climb up to a fence on the ridge.
(13) Turn left after the chicane towards the panoramic path marked with a blue and white rectangle. Stay on the north side near the ridge, enjoying the wide open view, until you reach the Graber shelter where you will find theGR®®531(blue rectangle).
(14) Enjoy the shelter, then rejoin theGR®®531, leaving the Red Ring marked trail on your right and continuing downhill through the forest towards Sewen. The trail crosses several forest paths and then meets a wide path which you follow to the right, still following the same Blue Rectangle markings.
(15) At the T-junction, leave theGR®®531and take the Red Triangle marked path on the left towards Langenberg. After the bridge over the Doller, you will return to the car park (S/E).