You can take this loop in either direction but my suggestion is to first move north west in the direction of Lachat d'en bas. You need your map and GPS here as there are a couple of roads and trails heading in that direction. The one you want to take takes you from Bay to Hauteville and then there is a 4x4 track thats leads you to Lachat d'en bas on the far end of this trail. This is where you climb up on the GRP Tour du Pays du Mont-Blanc towards Lachat d'en haut. From here you will start your long traverse along the plateau and this is the nicest part of the trail. From Lachat d'en haut you make your way in a south eastern direction and follow signs for Varan. The trail will split in an upper and lower route for meeting the 4x4 track traveling up from Bay to Varan. The higher route is nicer but I could not get my GPS application to accept it so the GPX file on our website takes you on the slightly lower route. You will then zigzag your way up towards Varan. There is a little extra loop that you can add by taking a left turn towards the paragliding launch area above le Pertuis. I did this extra loop but I did not add it to this trail description and GPX file. You will then reach the Chalets de Varan which offer a nice view and its a really nicely perched position. You will then continue on the trail and at the split take your way down the hill to the Chalets de Curalla and down the forest towards the town of Plateau d'Assy. Stay on the higher ground and take the traverse back to Bay and the starting point of this trail.