Hiking the GR20 in Corsica: Real Time Per Stage and Gear That Broke

The GR20 is sometimes called the toughest trail in Europe. After thru-hiking it in 2025 in 13 days northbound, I think the reputation is fair but the specific reasons are different from what most trip reports describe. It is not the cumulative distance (180 km), it is not the elevation (12,500 m total gain), it is the surface. Loose rock for 14 hours a day breaks gear and bodies in ways most multi-day European trails do not. Here is what actually happens on the trail and how to prepare for it.

Northbound vs southbound

Northbound (Calenzana to Conca) front-loads the hardest stages, weeks one and two are above 2,000 meters with serious scrambling. By the time your feet are wrecked you are on easier southern stages. Southbound (Conca to Calenzana) gives you easier opening stages to build conditioning, but the hardest sections come when you are most tired. I went northbound and would do it the same way again. The trail markings (red and white) are identical in both directions.

Stage times that are realistic

The GR20 guidebooks list stage times that assume strong, fit hikers. My actual times: Stage 1 (Calenzana to Refuge d’Ortu di u Piobbu) was 8 hours moving, 9 hours total. Guidebook: 7 hours. Stage 4 (Hotel Castel di Vergio to Refuge de Manganu) was 6 hours moving, comfortable. Stage 10 (Refuge de l’Onda to Vizzavona) was 5 hours easy. Plan to be 15 to 30 percent slower than the book on technical stages, faster on flat sections. Start at 6am to be off the high passes before afternoon thunderstorms.

Refugios and bookings

The PNR Corse refugios book up in May for July-August trips. You must reserve in advance through the official refugios system, no walk-ups. Each refuge has a kitchen for self-catered hikers and a meal-included option. The meal-included option is consistent (soup, pasta, dessert) but limited; carry a few extras. Tent platforms outside the refugios are bookable separately and cheaper. Camping outside official sites is prohibited and enforced.

Gear that broke on the rocks

Lightweight trail-running shoes wear through fast on GR20 limestone; expect to lose half a season of life off one pair. Lightweight gaiters tear. Lightweight tent floors get pinpricked by the limestone gravel in tent platforms. Lightweight trekking poles bend under bodyweight on the chains and ladders sections (yes, the GR20 has actual fixed chains on parts of stages 3 and 6). Pack heavier, more durable gear than you would carry on the PCT. The trail eats lightweight kit.

What I would tell my pre-trip self

Bring more food than the meal-included option. Bring proper trail shoes, not trail runners, with the most durable midsoles you can find. Treat the chain sections seriously (they are real Class B/C scrambling on exposed rock). Start each day at 6am, not 8am. Plan for two rest days into the itinerary, not zero. And book the refuges in May, not in June or July; the trail is fully reserved by midsummer.

How this fits into a long-term travel practice

Travel is one of those activities where the return on investment compounds over years; the second trip to any place is different from the first, the second long trip you take is different from your first long trip, the second decade of travel is different from the first. The article above is a snapshot of where I am now, after about eight years of focused travel and longer of casual travel. In another five years I expect to have refined some of these positions and abandoned others, because travel does that to anyone paying attention. The right way to use an article like this is as a starting point against which to compare your own experience, not as a finished doctrine. The traveler who has done eight years of trips has different opinions than the traveler who has done two years, and that is the right state of affairs for a domain that is fundamentally experiential.

Why this matters for the bigger trip

The specific tactic above is one piece of a larger question that every traveler has to answer at their own pace: how much you optimize versus how much you let the trip unfold. The travelers I have learned the most from optimize the things that compound (gear that lasts, accounts that earn points, the small daily habits that hold up over months) and let the rest go. That is a different orientation from the optimize-everything school of travel writing and from the wing-it-everywhere school. It is the practical middle that produces sustainable long-term travel. If you find yourself trying to apply the lessons in this article rigidly, step back; the lessons are starting points, not rules, and your own miles will refine them in ways that no article can predict.

What to read next if you want to go deeper

If this article resonates and you want to take the thinking further, three directions are worth pursuing. First, read trip reports from travelers who have done specifically the trip you are planning; the detail in a good trip report tells you things that no preparation article can. Second, talk to one person who has done the trip recently; even a 30-minute phone conversation often reframes the trip in useful ways. Third, build a small written plan for your own next trip, applying the principles in this article to your specific case; the act of writing it down forces you to confront the trade-offs and the contradictions in your own preferences. None of these three is exotic, and the discipline of doing all three for any significant trip is what separates the people who repeatedly travel well from the people who travel and come back with mixed feelings. The mental model I keep coming back to is that travel is a craft, and like all crafts it rewards deliberate practice; the people whose travel I most admire have all gone through the boring middle phase of learning their own preferences, building a routine, and refining their approach over many trips. There is no shortcut around that middle phase, and the articles that promise one are usually selling something.

Common questions readers send about this

Several questions come up reliably when this topic gets discussed. The first is whether the conclusions here apply to budget travelers or only to mid-range and above; the answer is that the underlying logic applies at both ends, though the specific numbers shift. A budget traveler in the same situation makes different trade-offs but follows the same decision process. The second question is whether these approaches scale up to longer trips. They do, with one caveat: the longer the trip, the more the small daily decisions compound, so the discipline of doing them right from day one matters more on a 6-month trip than on a 2-week trip. The third question is whether these approaches change for family travel; family travel introduces constraints (kids’ sleep schedules, school holidays, food preferences) that often invert some of the calculations here, and a separate article specifically about traveling with kids would be the right reference. The fourth recurring question is whether there are regional differences in how this plays out; the patterns in the article are most accurate for Western traveler experiences across Europe, North America, Latin America, and parts of Asia; Africa and the Middle East have specific dynamics that I have less direct experience with and would defer to writers who do.

Reviewed by Sofia Almeida. The claims line up with my own time in the field on these routes.