This guidebook describes the 'classic' route to walking the GR20 on Corsica, along with high- and low-level alternatives, plus extra mountain climbs. The guide explains exactly what is involved in following the GR20, including what walkers need to carry and how difficult the route is in places. Detailed route descriptions give all the information required and there are stunning photographs to inspire you along the way. Corsica is a mountainous island in the Mediterranean and its GR20 is one of the greatest adventure treks in Europe. It is reputed to be the toughest waymarked trail of all the GR routes. An ambitious route for fit and agile walkers, it covers 190km in about two weeks as it makes a complete traverse through the high mountains, negotiating magnificent mountain terrain and following the rocky central spine of Corsica across the whole length of the island. Some sections of the route are on walking trails, others are on bare rock where some hands-on scrambling is necessary. Facilities are limited to a dozen mountain refuges and a mere handful of hotels or gites.