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The complete guide to GR20 Corsica

The GR20 is a famous hiking trail in Corsica. It is considered by hikers to be one of the most difficult long-distance trails in Europe, and attracts walkers from all over the world every year. The GR20 crosses the Isle of Beauty from north to south, through the Corsican Regional Nature Park, and offers breathtaking views of varied and magnificent landscapes.

Preparing for the GR20

Before venturing onto the GR20, careful preparation is essential to ensure a successful experience. To plan your trip properly, start by choosing the dates of your hike and booking the refuges in advance to avoid unpleasant surprises. The GR20 is very busy during the summer months, so you need to plan ahead if you want to have space in the refuges.

The GR20 is reputed to be one of the toughest hiking trails in Europe, so make sure you’re in good physical condition by training regularly with specific strength-building exercises for mountain hiking. Finally, don’t forget to equip yourself properly with appropriate clothing, sturdy hiking boots and all the equipment you need for your safety, without carrying a bag that’s too heavy. Never forget that weight is your worst enemy on a trek.

The stages of the GR20 - Northern Section

The northern part of the GR20 is reputed to be the most demanding, but also the most spectacular in terms of scenery. Here are just a few of the first essential steps:

Stage 1: Calenzana to Ortu di u Piobbu – Begin your adventure in Calenzana and climb to the Ortu di u Piobbu refuge, offering breathtaking panoramic views of the Gulf of Calvi. Please note that in the hot season, this stage may be closed due to the risk of fire. Find out more about this step.

Stage 2: Ortu di u Piobbu to Carrozzu – Continue your journey through the Cirque de Bonifatu and down to the Carrozzu refuge, surrounded by majestic ridge landscapes. Find out more about this step.

Stage 3: Carrozzu to Asco Stagnu –
Stage 4: Asco Stagnu to Tighjettu
Stage 5: Tighjettu to Ciottulu di i Mori
Stage 6: Ciottulu di i Mori to Manganu
Stage 7: Manganu to Petra Piana
Stage 8: Petra Piana to Onda
Stage 9: L’Onda to Vizzavona

The stages of the GR20 - Southern Section

Stage 10: Vizzavona to E Capanelle
Stage 11: E Capanelle to Prati
Stage 12: Prati to Usciolu
Stage 13: Usciolu to Asinau
Stage 14: Asinau to Matalza
Stage 15: Matalza to I Paliri
Stage 16: I Paliri to Conca

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Summary table of GR20 stages:

Stage	Ascent (m)	Negative ascent (m)	Distance (km)
1. Calenzana to Ortu di Piobbu	1360	560	12
2. Ortu di Piobbu in Carrozzu	790	920	6.5
3. Carrozzu in Asco Stagnu	1360	640	7.5
4. Asco Stagnu to Tighjettu	1360	720	9
5. Tighjettu to Ciottulu di i Mori	730	330	10
6. Ciottulu di i Mori in Manganu	820	620	15
7. Manganu to Petra Piana	690	370	9.5
8. Petra Piana at Onda	620	790	6.5
9. L’Onda in Vizzavona	800	1310	9
10. Vizzavona to E Capanelle	1110	460	14
11. E Capanelle in Prati	620	370	16
12. Prati to Usciolu	680	510	9
13. Usciolu to Asinau	890	930	16
14. Asinau to Matalza	820	720	9.5
15. Matalza to Conca	620	1010	13

The distance of the GR20

The GR20 crosses Corsica from north to south over a distance of 180km divided into 15 stages, with a positive vertical drop of around 10,000 meters.

Practical tips for a successful GR20

For a successful experience on the GR20, here’s our advice:

Manage hydration and nutrition: Drink water regularly and carry energy snacks to maintain your energy levels throughout the hike.
Respect the environment: Protect nature by not leaving litter behind and by respecting local rules for preserving the ecosystem.
Listen to your body: Listen to your body and take breaks if necessary to avoid injury or exhaustion.