GR20 (Corsica High Route)
GR20 Corsica High Route: Ultimate Guide to France’s Legendary Long-Distance Hike
Embark on an epic adventure along the GR20 (Corsica High Route), renowned as one of Europe’s toughest and most captivating long-distance hikes. Spanning the rugged spine of Corsica, this legendary trail winds through dramatic mountain ridges, dense pine forests, and high alpine meadows, offering a symphony of breathtaking vistas at every turn. The GR20 challenges hikers with its steep ascents, rocky paths, and exhilarating ridge traverses, all set against the backdrop of Corsica’s untamed beauty.
From the moment you set foot on the trail, you’re immersed in a world where jagged peaks pierce the sky and crystal-clear streams cut through lush valleys. Along the way, rustic refuges and wild campsites provide moments of respite, while panoramic views offer an unforgettable sense of accomplishment for every trekked kilometer.
Route Overview
The GR20 is a point-to-point trail stretching roughly 180 kilometers from the northern village of Calenzana to the southern village of Conca. The route is traditionally tackled from north to south, although it can be hiked in reverse. The trail traverses the central spine of Corsica, passing through a sequence of remote mountain refuges, alpine passes, and high plateaus. Notable locations along the way include Ortu di u Piobbu, Refuge de Carrozzu, Refuge d’Asco Stagnu, Refuge de Manganu, Vizzavona (the route’s midway point and a potential spot to end or join the trek), Refuge de Prati, and the iconic Aiguilles de Bavella spires before the final descent into Conca.
The estimated duration for a full traverse is around 15 days, with hikers covering daily stages that range between 10 and 20 kilometers. The trail is marked with red and white blazes, but the path demands a high level of fitness and mountain experience. Expect rocky and uneven surfaces, frequent steep ascents and descents, sections of exposed scrambling, and limited shade. Facilities on the route include mountain huts (refuges), designated campsites, water sources at refuges, and basic provisions; however, services are sparse outside main stopping points.
The GR20 experience varies significantly between its northern and southern halves: the northern segment is notably rougher, with steeper climbs and more technical terrain, while the southern half, although still rugged, features slightly gentler gradients and more forested stretches. Proper preparation, awareness of changing mountain weather, and adequate equipment are essential for successfully navigating the route.
Historical Context of the GR20 Corsica High Route
The GR20 was officially established in 1972 as part of France’s Grande Randonnée (GR) network, designed to showcase the unique landscapes and cultural heritage of Corsica. However, the roots of the trail extend far deeper, tracing pathways once used by shepherds, traders, and villagers traversing between remote mountain communities. These ancient routes, known as “mare a mare” trails, connected Corsica’s rugged interior long before modern tourism, bearing witness to centuries of local history.
Over time, the GR20 earned a reputation as one of Europe’s most challenging treks, drawing adventurers seeking to test themselves against Corsica’s dramatic terrain. The trail is steeped in legends of the island’s resilience and independence, having served as both a natural barrier and a connection between Corsican communities during periods of conflict, migration, and celebration. Hikers today follow in the footsteps of generations who navigated these mountains, experiencing a landscape shaped by both natural forces and the enduring Corsican spirit.
Notable highlights
- Calenzana: The traditional trailhead in the north, a charming Corsican village set among olive groves, marking the start of the GR20’s ascent into the mountains.
- Pointe de l’Inferno: A dramatic rocky peak renowned for panoramic views over Corsica’s rugged landscape; a challenging but rewarding section early in the route.
- Refuge de l’Ortu di u Piobbu: One of the first mountain refuges encountered, offering breathtaking ridge views and a true sense of the remote wilderness.
- Cirque de la Solitude: Once known as the trail’s most daunting and infamous section, with sheer cliffs and technical terrain (note: currently bypassed due to safety concerns, with a rerouted path).
- Refuge de Manganu and Lac de Nino: Nestled within lush meadows, the glacial Lac de Nino is famed for wild horses grazing near its tranquil waters, surrounded by scenic high-altitude grasslands.
- Breche de Capitellu: A high mountain pass featuring stunning views over the jagged peaks and turquoise lakes below; a physically demanding climb that rewards with spectacular scenery.
- Vizzavona Pass: Considered the halfway point, this area includes the Vizzavona Forest, waterfalls, and a train station for those opting for a shorter traverse.
- Monte d’Oro and Monte Rotondo: As some of Corsica’s highest summits, these nearby peaks present striking backdrops and optional detours for experienced mountaineers.
- Refuge d’Usciolu and the Aiguilles de Bavella: The southern section’s dramatic rocky spires are a highlight for their distinctive shapes, technical trails, and sweeping viewpoints.
- Conca: The GR20’s endpoint in the south, where hikers celebrate the completion of their journey in a picturesque village nestled in the Corsican hills.
Challenges to expect
The GR20 is widely regarded as one of Europe’s most demanding long-distance hikes, with strenuous ascents and descents across rugged, rocky paths. Several sections require hands-on scrambling and traversing exposed ridges, particularly in the northern half of the trail. The terrain is often uneven, with loose rocks and boulder fields that demand careful footwork, while river crossings become more difficult after heavy rains. Some stages are long and remote, making physical fitness and mental endurance essential for safe completion.
Weather on the GR20 can shift rapidly, even during the optimal hiking season. Hikers may encounter intense sun, strong winds, sudden rainstorms, and occasional lingering snow on higher passes. Thunderstorms can roll in without warning, making high-elevation exposure particularly risky. Water sources are not guaranteed at all points, so carrying sufficient supplies and planning resupply points at refuges is vital.
Navigation is generally aided by red and white trail markings, but heavy fog, rain, or snow can obscure the route, increasing the risk of losing the path or taking a wrong turn. GPS devices and up-to-date maps are recommended, as some path diversions and reroutes occur due to landslides or weather conditions. Advanced planning, flexibility, and respect for the mountain environment are key to managing these challenges and completing the traverse safely.
France - Mountainous
- Forest
- Dirt
- Rocky
- Huts
- Campsites
- Wild camping spots
- Pet Friendly
- Restrooms
- Water Sources
- Campsites
- Shelters
The trek begins in the village of Calenzana, quickly ascending through Mediterranean scrub and into pine forests. The route steadily climbs into rugged granite terrain, offering impressive views back toward Calvi and the coastline. The day ends at the mountain refuge Ortu di u Piobbu, perched high above the valleys.
A challenging but rewarding day with steep ascents and descents through wild granite landscapes. The path traverses ridgelines and crosses rocky slopes, passing through fragrant maquis before a steep descent to the Carrozzu refuge, near the Spasimata footbridge.
Cross the famous Spasimata suspension bridge before ascending through a series of spectacular river gorges and granite slabs. Steep, technical climbs lead to Bocca di Stagnu (Col de l’Osci) before the trail descends to the ski station at Asco Stagnu.
Considered one of the toughest days, this section features a long, intense climb to Bocca Tumasginesca and a traverse of high alpine ridges. The trail passes the foot of Monte Cinto, Corsica’s highest peak, before descending steeply to the Tighjettu refuge.
A relatively short but scenic day featuring a traverse high above the Golo valley. There are sweeping views of surrounding peaks and valleys before reaching the Ciottulu di i Mori refuge, located at one of the highest points along the GR20.
Descend from the high granite ridges into lush river valleys, passing through alpine meadows and by the tranquil Lac de Nino, known for its wild horses and scenic beauty. The trail continues to the peaceful refuge at Manganu.
This day involves a gradual ascent to high ridges with panoramic views over glacial lakes, including Lac de Capitellu and Lac du Melo. The route then traverses rocky slopes before a final climb to the Petra Piana refuge.
A high-level traverse following airy ridgelines with sweeping views across Corsica’s central mountain spine. After passing through rocky terrain, the trail descends into pine forest before arriving at the L’Onda refuge.
This stage includes a choice between a high, rugged ridge and a lower forested route. Both lead through the beautiful beech and pine woods of the Vizzavona Forest. The stage concludes at Vizzavona, the midpoint of the GR20, with amenities and transport connections.
Heading south from Vizzavona, the route climbs out of the forest, following ancient mule trails with gentler gradients compared to the northern stages. You reach the E Capanelle refuge after traversing open slopes and scattered woodlands.
This section presents a mix of shady forest walking and open ground, passing ancient shepherds’ huts and streams. The gradual ascent finishes at the Bocca di Verdi refuge, set below the high peaks of the region.
The route continues across mixed forest and high mountain terrain, with a challenging ridge walk that features panoramic coastal views. The path is rocky and windswept before it descends to the Usciolu refuge.
This challenging day features windswept ridges and a breathtaking traverse along the crest of the Monte Incudine massif. Harsh, exposed terrain gradually softens as the trail descends toward the Asinau refuge.
Perhaps the most scenic day in southern Corsica, this section traverses the iconic Aiguilles de Bavella—jagged granite spires recognized throughout the island. After navigating through stunning landscapes, the route descends to the Paliri refuge.
The final day follows a descending route, weaving through pine groves and maquis with panoramic views toward the Mediterranean. The trail ends at the village of Conca, marking the completion of the GR20.