We start this trail at the Grepon Parking. There will be a trail marker for the Cascade du Dard waterfall. This paved path will have you follow the main road out of Chamonix for a few hundered meters before telling you to take a left onto the trail. Keep following the signs for the Cascade de Dard. At the Buvette de la Cascade du Dard there will be trail marker for Cero. Follow this past the carpark and up a trail that will lead you a tunnel below the highway at the Mont Blanc Tunnel. The trail marker at the suspension bridge will point you in the direction of the Gare de la Para. This path follows the Torrent de la Creusaz upstream. From here there are no junctions and you can just follow the trail and trail markers all the way up to the Gare de la Para and then the Gare des Glaciers. At the Gare de Glaciers you will see a red trail marker for the Plan de l'Aiguille point you in a northern-eastern direction. You will see yellow marker signs mounted on the rocks which you can follow. As you approach the Glacier des Pelerins you will be given a choice to take the red route and cross the terminus of the glacier which has receded so far that there is no more permanent ice. The other choice is to follow the yellow markers which will point you downhill. You should take the yellow marked path which will have you cross the glacier terminus at a lower altitude. The path is still technical with large boulders but nothing too crazy. This path will take you to the Plan de l'Aiguille lift station. From there its a short descend to the Refuge de Plan de l'Aiguille. From there its a single track all the way down the mountain. The only main junction you will hit is the one where you can either take a left to the Cascade de Dard or a right to continue on to the Grepon parking. If you parked at the Cascade then return that way. If you started at the Grepon Parking then follow the signs in that direction.