10 Essentials for the GR20

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The GR20 is an intimidating trek. Between the complicated logistics and the serious physical challenges, traversing the rugged spine of Corsica is no small feat. The GR20 doesn’t allow much room for error or easy outs; little oversights can quickly become big issues on the trail. The reward for all of your toil? An unforgettable adventure like nothing else.

You’ll work hard enough on the trail without having to deal with avoidable snafus that result from poor preparation. We were infinitely glad that we did our homework ahead of time, and now we want to share our experience with others. Below we’ve listed our best, most essential advice for anyone hoping to tackle the GR20. It’s in no particular order, but it’s all guaranteed to help you have a smoother, safer, and more enjoyable experience on the GR20.

Everything you need to to plan your GR20 trek – all in one place.

Whether you prefer mountain huts or tents, fastpacking or meandering, luxury, dirtbag or something in between, we’ve got you covered.

From custom itineraries and GPS maps created specifically for you we can help you plan your perfect GR20 adventure!

Our downloadable Guide to the GR20 is ultimate resource to help you plan your perfect trip.


Our 50+ page downloadable guide has everything you need to know to plan your GR20 adventure. From three unique itineraries with custom GPS data to a full training plan, our guide is the quintessential handbook for anyone walking this incredible trail. Each section provides in-depth information and resources, including:

  • Stage-by-stage itineraries and descriptions
  • Detailed maps for every stage
  • Adaptable 14-day, 15-day, and 16-day GR20 itineraries
  • Custom GPS data for the entire walk & each of the three itineraries
  • Offline map access for the entire route
  • Lodging recommendations
  • Getting to/from the trail
  • The ultimate packing list
  • A 15-week training plan

Get your digital guide today and start planning!



Trail in the foreground with a peak in the background on the GR20.
Your GR20 adventure awaits!


1. Start Early

Morning people rejoice! There are so many reasons why it’s important to get on the trail at daybreak each day.

First, as most hikers will be trekking the GR20 in the summer season, it is imperative to minimize your exposure to the intense Corsican heat.

Furthermore, the afternoon thunderstorms on the GR20 (an almost daily occurrence in July and August, but common throughout the year) need to be taken seriously. Getting caught in a storm on high, exposed peaks or ridgelines is extremely dangerous. Starting early will allow you to get off these sections of trail before the storms roll in.

Beyond the crucial safety reasons for hitting the trail early, there are some additional perks. These include getting your pick of the best bunks and campsites before the crowds (and avoiding the long line for the shower!), witnessing incredible sunrises from the trail, and having ample time to relax and recover in the afternoons. Your exact starting time will depend on your hiking pace, the time of year, and your daily distance goal, but many hikers choose to start just before sunrise (somewhere between 5:30-6:30 am). If you’re starting in the dark, don’t forget your headlamp!

Sunrise over a rocky outcropping on the GR20
Just one of the many incredible sunrises we enjoyed on the trail!


2. Carry Plenty of Cash

We wrote more extensively about GR20 money and budgeting in this post, but this advice is important enough to earn a spot on the Essentials list too. You will not find ATMs or banks at any point along the GR20, and very few shops, refuges, hotels, and restaurants accept credit cards. Therefore, you need to carry enough cash to cover all of your expenses for your entire trek.

Running out of money can completely sabotage your trek, as you’ll need to leave the trail to find an ATM (which will take a full day or more). Even if you plan on traveling frugally, you’ll need to restock food and other supplies along the route. It is also important to have some backup funds in case unexpected emergencies arise. Make sure you check out our How Much It Cost Us to Hike the GR20 article to estimate your expenses and avoid this common GR20 pitfall.


The well stocked shop at Hotel Castel di Vergio
The well-stoked shop at Hotel Castel di Vergio- You never know when you’ll need to resupply on cookies and crisps!


3. Think Through Your Logistics

Corsica is known for many wonderful things (incredible beaches, rugged mountains, rich history), but excellent tourist infrastructure isn’t one of them. It can be quite difficult to get to and from the GR20. This is due to limited and infrequent transportation connections, unclear and constantly-changing schedules, and a general lack of accessible information.

It’s a very good idea to plan ahead of time for how you will get to and from the GR20, as you’ll need to make sure that busses/trains are running when you want to start and finish your trek. Additionally, we highly recommend booking your lodging in advance and researching any luggage storage or transfers you may need.

Fortunately, our in-depth GR20 Logistics article covers all of this and more. It’s an excellent place to start sorting through all of the important nuts and bolts of your trip.

We also highly recommend downloading the Hiiker App on your phone before you start your hike. It provides maps and valuable information like bus stops, accommodation, and amenities, and can be used without cell signal or data. The app makes navigating and problem-solving on your GR20 trek so much easier! 


Bus ticket for Sainte Lucie de Porto Vecchio to Bastia
Most buses and trains use high-tech ticketing systems like this one ;)


4. Ditch Your Ego

When it comes to the GR20, all previously held notions of your hiking speed will need to go out the window. When looking at the time estimates for certain stages in your guidebook, you might be inclined to think there’s been a mistake, but indeed they are accurate (or perhaps even underestimated). The GR20 requires so much scrambling and careful navigation of technical terrain that it can take several hours to cover even a couple of miles.

Here’s the thing: it’s okay to move slowly. The rugged nature of the trail is exactly what makes it so fun and rewarding; make sure to give yourself enough time to actually enjoy it. Furthermore, it is incredibly unwise and unsafe to try to move faster than you can realistically manage. We met so many hikers who thought they could “double-up” on stages only to end up burnt out, nursing injuries, or just downright miserable. If you don’t have enough time to complete the entire trek, it’s better to simply cut out a stage or two instead of trying to rush through all of it.

Read More: How to Train for the GR20


A hiker uses a fixed chain to scramble up a rocky section of the GR20
Some sections require you to slow down quite a bit!

Unless you plan on carrying your own tent, it is pretty much essential that you reserve your accommodation in advance. During the peak season (June-September), the refuges are full every night. While you can try to show up early and score a bed without prior booking, it is unlikely that you’ll get lucky every stage of the way. Bookings are strongly encouraged for the refuges, and they are just as necessary if you plan on renting a tent. Additionally, it’s a good idea to reserve your accommodation in Calenzana, Conca, and Vizzavona, as these towns are quite small and the lodging options are limited.

Another important note on bookings: At many of the refuges, the warden will want to see a printed copy of your reservation. It’s not uncommon for people to lose their spot or pay twice if they don’t have a printed booking. If your itinerary changes due to weather or other issues, you can call ahead to the refuges and try to modify your reservation.

Check out The Ultimate Guide to the GR20 for details on how to reserve refuges and tents. 


Tents outside the Refuge de Matalza
A full campground on the GR20. The refuge was even more packed!


6. Feast on Local Delicacies

Because the GR20 doesn’t pass through many villages, hikers have very few opportunities to experience traditional Corsican culture during their trek, which is a shame. However, you can get a [literal] taste of Corsica through the incredible culinary delights you’ll encounter along the trail. Not only are these foods fresh, local, delicious, and reasonably-priced, but they are a great way to learn a little more about the place you’re lucky enough to be exploring. Here are a few can’t miss items:

  • Charcuterie: Known worldwide as some of the best, many of the refuges serve up uber-local varieties.
  • Cheese: Most of the traditional Corsican cheeses are made with goat and/or sheep’s milk, including Brocciu, arguably the most popular and widespread varietal. Be sure to sample the local cheeses whenever you get the chance!
  • Canestrelli: These treats are very similar to biscotti and they come in a wide range of delicious flavors. They’re available at nearly every refuge and they make an excellent hiking snack.
  • Pietra Beer: Made with chestnuts from the island, Pietra beer has a complex, slightly sweet, and entirely unique flavor. Even though beer is shockingly expensive across Corsica, we think you’ll find that enjoying a cold Pietra after a big day in the mountains is money well spent.


Block of Corsican cheese.
That block of local cheese may be calling your name after a long day!


7. Take A Rest Day

As we mentioned earlier, the GR20 is a very difficult endeavor. It will put both your physical and mental endurance to the test. Throughout your trek, it will be imperative that you make a conscious effort to take care of yourself in order to prevent injury and burnout. One of the best ways to do this is to plan for a day off in your itinerary. Obviously we know that the GR20 is already very long, and not everyone will have the time to make this work. However, if it’s at all possible, we strongly recommend that you take a rest day. Not only will you give your body time to recover and rejuvenate, but you’ll have a chance to explore Corsica in ways that don’t involve hiking.

Vizzavona, located halfway through the route, is arguably the best place to spend a rest day. There are a couple of good shops where you can restock supplies, and there are several lovely restaurants and hotels where you can indulge in some creature comforts. Our GR20 Logistics article has tons of helpful information on rest day options and considerations.

Woman with a glass of wine in front of Casa Alta B&B in Vizzavona Corsica
Living it up on our day off in Vizzavona!


8. Make New Friends

Many people are drawn to the GR20 because it offers the opportunity to experience solitude while trekking in wild and rugged landscapes. This is without a doubt one of the best parts of the trek, and you’ll certainly get to savor many moments alone in the mountains. Therefore, it might come as a surprise that time spent socializing with other people is one of the most memorable parts of many GR20 hikers’ experiences.

Since you’ll be starting and ending at the same refuges as many others each day, you’ll become familiar with those following a similar itinerary. You’ll have ample opportunities to chat along the trail, share a beer and a picnic table at sunset, cook your meals alongside your camp mates, and swap stories with new friends. Don’t pass up these opportunities! Meeting people from all over the world who share your love of the outdoors will make your experience so much richer. It was definitely one of the most fun, rewarding, and memorable parts of our GR20 adventure.

Trekkers sitting on rocks at Refuge de Manganu.
Kicking back and making friends at Refuge de Manganu.


9. Practice Your French

We’d be lying if we said it was utterly impossible to trek the GR20 without knowing any French. You could likely get yourself to and from the trail, navigate refuge check-ins, purchase food and supplies, and muddle your way through any unexpected issues that might arise. But just because you can do it, doesn’t mean you should try. You’re going to have a much, much easier and more enjoyable experience if you take the time to brush up on your French skills before your trek. Not only will people appreciate your efforts (and therefore be more friendly and helpful), but there will undoubtedly be situations where English isn’t spoken and you need to communicate something.

You don’t need to be fluent, but you should learn some basic phrases relating to accommodation, weather, navigation, transportation, and food and drink.


Chalkboard menu at Refuge de Carozzu
Learn how to order food and drinks in French before your GR20 trek.


10. Leave No Trace

The GR20 traverses some truly stunning wild places. It is our responsibility to respect these places so that others can enjoy them now and many years into the future. This might seem unnecessary to discuss; after all, as hikers we have shared passion for the outdoors. However, if I had a Euro for every piece of trash or used toilet paper I saw on the trail, I would easily have enough money to take a luxury vacation. It’s simple: pack it in and pack it out. Stay on the designated trail. Don’t pick flowers or other vegetation. Furthermore, carry a small bag with you so you can pick up any trash you find along the trail, leaving it even more beautiful for those who come after you. Do your part and the mountains will reward you with their awe-inspiring beauty. 

Do your part to protect this incredible place!


That’s it!

We hope you found this list to be helpful and we genuinely believe following this advice will allow you to have a less stressful and more rewarding experience.
Did we miss anything? Let us know in the comments below. And don’t forget to check out all of our other great GR20 content: 

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