A lesser known trail - the Cicerone Pyrenean Haute Route is a detailed guide to 800km trek along the Franco-Spanish border, from Hendaye to Banyuls-sur-Mer. The unwaymarked route is described in 45 days, with 500 GPS waymarks, information on villages, mountain huts, guesthouses, hotels and campsites and variant routes to avoid difficult sections. Also ascents of ten classic Pyrenean summits beside the route. Best times of year to visit: July and August. August can be extremely warm and thunderstorms are an everyday hazard! In June most high mountain passes are still covered with snow but it's a good time for both the first section and, from mid-June on, the final section (if you avoid Pic Carlit). Late August and the first days of September often bring a short period of extremely bad weather but afterwards the first half of September can be exceptionally beautiful. There will be frost at night from the second half of September. Snowfall in the high mountains is not uncommon in September. Be ready for anything!