About the GR 20 Trek
The GR 20 stands as one of Europe's most legendary long-distance trekking routes, often called the continent's most demanding alpine trail. This iconic 170km route traverses Corsica's rugged spine from north to south, ascending and descending relentlessly through a landscape of crystalline mountain lakes, wild maquis vegetation, and dramatic granite peaks. Trekkers experience true alpine wilderness—a journey through remote refuges, boulder fields, and ancient shepherd paths that wind through the heart of the Mediterranean island. The GR 20 is not for the faint-hearted; it demands respect, preparation, and mountain experience, but rewards adventurers with unparalleled solitude and raw natural beauty.
Duration
7–10 days
Difficulty
Very Hard
Best Season
June–September
Elevation Gain
~1200m/day
Gallery
Route Highlights
Bocca di Verdi
The dramatic col marking the northern gateway into Corsica's alpine zone, with sweeping views across the island.
Lac de Nino
One of Corsica's most pristine high-altitude lakes, surrounded by bare granite and rare Corsican pine.
Refuge de Manganu
A legendary mountain shelter perched at 1601m, offering refuge and camaraderie among hikers from across the globe.
Aiguilles de Bavella
Dramatic granite needles rising from the southern section, providing some of the route's most spectacular alpine scenery.
Monte Rotondo
Corsica's second-highest peak at 2622m, offering a rewarding summit push with panoramic Mediterranean views.
Corte Valley
The cultural heart of Corsica, where trekkers pass through ancient villages and meet the island's mountain heritage.
What to Expect
The GR 20 is a technical mountain trek that requires physical fitness, alpine experience, and mental resilience. Expect significant daily elevation changes, exposed ridge walking, rock scrambling, and water crossings. Mountain weather can change rapidly, and overnight accommodations range from remote mountain refuges to bivouacs under the stars. This is a trek for experienced mountaineers seeking an authentic alpine challenge.