Start at Argentières - les Chosalets roundabout (Line 1 Bus Stop) Sign-post 17 is just behind the bus shelter. After crossing the Chosalets, the path follows a meandering and rolling high traverse for 3km - an ideal warm up before tackling the climb to the village of Le Lavancher. The route goes progressively higher and higher until it reac hes the Chapeau mountain café. It is possible to make a return trip from here to the viewing point onto the Mer de Glace, before launching into the second part of the climb, which is even steeper and requires great care. At the approach to the alpine meado ws of La Pendant the route descends a little way to a flattish rise leading to the final descent. The descent, losing 650m of altitude, is made on a good footpath.