The start of the route is at the Col de la Schlucht car park.
(S/E) Head towards the chairlift/summer toboggan run and turn left of these facilities. As you do so, take the steps and enter the clearing. A little further on, you will find theGR®5markings, a Red Rectangle. Follow these markings and you will arrive at the Martinswand Rocks.
(1) Continue in the same direction (south-west) to reach the Col de Falimont.
(2) Take the path on the left (south-east), which leads to the summit of the Honneck at the orientation table.
(3) From there, head right (south-west) along the path marked with Yellow Rectangles (yellow-white-yellow), then Red Rectangles (red-white-red).
(4) You’ll reach the source of the Moselotte on your right.
(5) When you reach the fork (elevation 1286), turn left then right to take an uphill path, running parallel to the path you left, which will take you to the top of the Kastelberg ski lift.
(6) The path branches off to the right and leads to a crossroads.
(7) At this point, continue straight on following the red-white-red Red Rectangle markings. Pass in front of the Ferme Auberge du Ferschmuss and then in front of a mountain hut.
(8). Continue in the same direction (south-south-west) to reach the Rainkopf.
(9) From the Rainkopf, leave the path you’ve been following and turn right, then quickly left, passing via the Rothenbachkopf.
(10) Continue south-west then south on the original path. You arrive at the Batteriekopf.
(11) And then to the Herrenberg Pass.
(12) Continue south-east, following theGR®, marked with a Red Rectangle. Follow this path without turning off, passing the Hahnenbrunnen Refuge.
(13) You then reach the Col d'Hahnenbrunnen, crossing the road.
(14) A little further on, cross the road once, then a second time, heading south-west. Continue along the right-hand side of the road to reach Markstein.
(15) Here, you’ll be on the road for a few dozen metres before heading towards the Grand Ballon (road sign). Pass the Auberge du Markstein on your right, cross the road and take the path on your left, marked with the same sign (Red Rectangle). This path goes via the Col du Hundsrucken.
(16) It then reaches the Col du Moorfeld, running very close to the road.
(17) You should then follow the Yellow Rectangle markings, which take you a few hundred metres further into the forest. Pass close to the Riedisheim Ski Club hut, then, at the next fork, turn right to rejoin the road a short while later at the Col du Haag.
(18) Cross the road and follow it on the right-hand side, following the red-white-red Red Rectangle markings. Finally, pass under the summer toboggan run and look up to see the Hôtel du Grand Ballon chalet. Walk past the hotel, descend a few metres to reach the car park, the end of the hike (S/E).

I downloaded it onto my eTrex 30x GPS and followed the trail closely, but sometimes took the wrong path when trying to follow the signs. Perhaps the route has changed a little. The start of the hike is really nice, but I wasn't very lucky with the view as the sky was very cloudy. I left at 8:15 a.m. and arrived at the Haag Pass at 5:30 p.m. after taking a few short breaks. I took a long break at Markstein to go summer sledding ^^ I climbed to the summit of Grand Ballon on Sunday because I found accommodation nearby with a local resident who finished work at 6 p.m. So I wouldn't have had time to go up and come back down, as she would have left without me.