GR20, the twentieth “Grande Randonnée” or “great hike”, is a long-distance trail that crosses the French island of Corsica north to south. It’s considered by many to be the most challenging hike in Europe, with rugged terrain, steep ascents and descents, and narrow ridges which define the island’s jagged spine. Walking it is already challenging enough, but some hardcore athletes go as far as running it in hopes of breaking the speed record.
The trail covers approximately 180 kilometers (112 miles) and can take up to two weeks to complete. Divided into 16 stages, it takes hikers through some of the most beautiful landscapes in Corsica, including snow-capped peaks, rocky ridgelines, dense forests, and crystal-clear lakes.
To complete the thru-hike, you’ll need a very high level of fitness and experience with hiking on mountainous terrain, as there are some technical sections that require a good deal of scrambling. The trail is well marked with red-and-white stripes and there are refuges and campgrounds along the way where you can rest and spend the night.