boucle St Martin de Fressengeas 18 km variante 15 km 270.3 265.5 265.4 266.6 267 267 268 269.6 267.5 265.3 265 269.9 266.5 260.2 263.7 265.6 274.3 289.2 288.4 293.3 295.8 296.1 296 297.5 299 299.1 299.8 300.9