The "Grande Randonnée" (GR) refers to a network of long-distance hiking trails in France and other European countries. These trails are marked with a distinctive white and red blaze, guiding hikers through diverse landscapes, including mountains, forests, and coastal areas. The GR routes vary in length and difficulty, catering to both casual walkers and experienced trekkers. Established in the 1940s, the GR system promotes outdoor activities and encourages exploration of natural and cultural heritage. Many trails connect to form extensive routes, such as the famous GR 20 in Corsica, known for its challenging terrain and stunning scenery.