LeGR20
180KM
12.0kM
15d
The GR20 is widely regarded as the most demanding long-distance trail in Europe. Stretching 180km along the jagged mountain spine of Corsica, it is a high-altitude odyssey between Calenzana in the north and Conca in the south. The route sits on the boundary between strenuous trekking and non-technical alpine scrambling, characterized by steep granite ridges, exposed chains, and the legendary Mediterranean sun. It requires not just physical endurance but a high degree of comfort with rocky, uneven terrain. Note: Compiled from public sources — not a field report.
Mission Directive / X-Factor
“The Cirque de la Solitude & The Scrambling. The 'X-Factor' is the sheer technicality of the terrain. Unlike many long-distance trails that follow maintained dirt paths, vast sections of the GR20 require genuine scrambling over massive granite slabs and relying on heavy iron chains to haul yourself up steep drops. Historically defined by the demanding Cirque de la Solitude (now bypassed due to a landslide but maintaining its aura), the trail forces you to use your hands as much as your feet.”
Hazard Assessment
Corsica in July and August is punishingly hot, yet the high mountains generate sudden, sustained afternoon thunderstorms with frequent lightning.
MITIGATION: Start hiking before dawn (5 AM) to finish the stage and reach the next refuge before the afternoon storms and peak heat hit.
The northern stages (especially around the Monte Cinto bypass) feature highly exposed scrambling on bare rock that becomes remarkably slick when wet.
MITIGATION: Wear approach shoes or stiff boots with 'climbing zone' sticky rubber edges. Do not attempt technical stages in heavy rain.
Critical Loadout
Water Logistics
HIKING
PATHWAY
Corsica // trekking
Calenzana to Asco-Stagnu
The technical initiation. Rapid ascent into the high mountains, passing Ortu di u Piobbu and Carrozzu, featuring the first steep granite slabs.
Asco to Vizzavona (The North)
The high-altitude crux. Crossing the Monte Cinto massif via the Pointe des Éboulis and the high-altitude plateau of Refuge de Petra Piana.
Vizzavona to Bavella
Entering the 'green' south. Lower but still rugged terrain through beech forests and over the high-altitude ridges of Bocca di Verde.
Bavella to Conca
The final descent. Navigating the spectacular Aiguilles de Bavella before dropping down toward the Mediterranean finish in Conca.
| Step | Sector / Waypoint | Dist. | Gain (↑m) | Duration | Assessment |
|---|---|---|---|---|---|
| 1 | Calenzana to Asco-Stagnu The technical initiation. Rapid ascent i... | 45km | 3,200m | 4 Days | Standard Segment |
| 2 | Asco to Vizzavona (The North) The high-altitude crux. Crossing the Mon... | 60km | 4,500m | 5 Days | Standard Segment |
| 3 | Vizzavona to Bavella Entering the 'green' south. Lower but st... | 50km | 3,000m | 4 Days | Standard Segment |
| 4 | Bavella to Conca The final descent. Navigating the specta... | 35km | 1,300m | 3 Days | Standard Segment |
Technical Specifications
DOC_REF: GOLDEN_HIKING_FRANCE_001Refuge Capacity
Mandatory overnighting at Parc Naturel Régional de Corse (PNRC) refuges. You must book either a dorm bed, a rented tent, or a pitch on the PNRC website well in advance.
Regulatory
- Permit REQUIRED
- Authority PNRC (Parc Naturel Régional de Corse)
You must pre-book your refuge bed or tent pitch months in advance through the official PNRC website.
Climatology
- OptimalJun, Jul, Aug, Sep
Best from late June to mid-September. June often has lingering snow requiring equipment. August is excessively hot and crowded. Early September offers the best balance of weather and stability.
Emergency / Comms
- Rescue (EU) 112 ACTIVE
- Signal Poor
Compare With Other Hikes
Side-by-side metric analysis. Compare Le GR20 directly against similar routes ÔÇö distance, elevation gain, HikeMetrics Hazard Score, and more.
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