- Region
- France
- Best season
- Spring, Summer
- Permits
- Confirm current GR20 permit requirements a…
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Photos of GR20, Corsica
How to get there
Plan travel to Corsica, then onward access to Calenzana for the northern endpoint or Conca for the southern endpoint. A complete traverse finishes at the opposite endpoint, so arrange onward travel separately.
- Calenzana
The northern endpoint of the GR20 and the starting point for a southbound traverse through Corsica’s mountains to Conca.
- Conca
The southern endpoint of the GR20 and the starting point for a northbound traverse to Calenzana.
Sources: Wikipedia · Wikivoyage. Confirm road and trailhead conditions with the managing agency before you leave.
France · Season: Best: Jun – Sep
- Climbing
- Mountaineering
- Hiking
The country
Corsica's central granite spine — sharp ridges, deep granite valleys, and Mediterranean scrub. Trail runs north (Calenzana) to south (Conca) in 15 stages that rarely drop below 1,200 m.
Why enthusiasts come
Reputation as Europe's hardest long trail. Genuine scrambling on Class-2/3 rock, big daily elevation, and huts spaced for a serious walker.
Planner-relevant notes
Refuges reserve on release day — May 15 opens most. Water at refuges only in dry summers. Trainer-style shoes fail; approach shoes or light boots are the working choice.
Top experiences
The full GR20 (16 stages, 180 km) is Europe's hardest waymarked trail. The North (Calenzana–Vizzavona) is the harder half. Refuge stops are basic but functional. Cirque de la Solitude was rerouted after 2015 landslide.
Planning essentials
Refuge bookings open in Mar via PNR Corse — sell out fast. Wind and thunderstorms on the high sections shut travel for a day at a time. Ferry from mainland France is the standard cheap access.
Field notes
- Bring cash — refuges are cash-only in most stages.
- The Cirque de la Solitude bypass is now the standard after 2015 rockfall.
- Late-August thunderstorms can shut ridge stages for 24 hours.
- The GR20 rockfall risk is real — a helmet is defensible extra weight.
- Water sources are marked but seasonal — carry 3 L capacity minimum.
Where on earth
Satellite imagery flying in from a world view to GR20, Corsica, France. Use the + / − buttons, or click the map to zoom with your scroll wheel; drag to pan and pinch to zoom on touch.
Coordinates
- Decimal degrees
- 42.1500, 9.0500
- Latitude (DMS)
- 42° 8′ 60.0″ N
- Longitude (DMS)
- 9° 3′ 0.0″ E
Coordinates are an access-point reference for GR20, Corsica, not a route. Carry a paper map and confirm trailhead or put-in access with the managing agency before you go.
Topic summary
Europe's toughest waymarked trek — 180 km across Corsica's mountain spine.
Key takeaways
- Region: France
- Best season: Best: Jun – Sep
- Coordinates: 42.150, 9.050
Climate suitability
Best: Jun – Sep
Keep planning
Popular pursuits at GR20, Corsica
- Climbing
Rock and alpine lines with approach beta.
- Mountaineering
Glacier and high-route objectives with real consequence.
- Hiking
Day miles on marked trail, with route notes and trail links below.
Animals around GR20, Corsica
A mountain traverse of Corsica
The GR20 crosses Corsica’s mountains between Calenzana in the north and Conca in the south, running most of the length of the island. Corsica lies in the Mediterranean, southeast of mainland France, west of the Italian Peninsula and immediately north of Sardinia. Despite that island setting, this is a mountain journey: a single mountain chain makes up two-thirds of Corsica. The trail belongs to the Grande Randonnée network of long-distance walking routes and covers 180 km. Its defining feature is the sustained passage through rugged terrain, rather than a connection between coastal destinations. Plan around the demands of the mountain traverse itself, with arrival on the island and onward travel to an endpoint treated as separate parts of the trip.
Distance is only part of the difficulty
The GR20’s 180 km come with around 12,000 to 13,000 metres of climbing and descent over rugged ground. That combination makes horizontal distance a poor guide to daily effort. A schedule based only on kilometres can leave too little room for the work of repeated ascent and descent, particularly while carrying equipment. The route is often described as Europe’s toughest long-distance trail; the useful planning takeaway is its sustained physical demand, not the superlative. Prepare for mountain walking rather than assuming that experience on gentler long-distance paths will transfer directly. Footwear, pack weight and fitness deserve careful attention. Leave flexibility for mountain weather and slower progress, and assess each day against terrain and elevation change rather than distance alone.
Build the trip around the two endpoints
Calenzana and Conca provide the clearest framework for planning a complete GR20 traverse. They sit at opposite ends of a route that runs through Corsica’s mountains, so a full walk requires arrangements at both ends rather than a return to the same trailhead. Choose a direction in conjunction with those arrangements, without assuming that reversing the route removes its rugged terrain or cumulative climbing and descent. Confirm endpoint transport and current trail conditions before committing to a fixed itinerary. Mountain weather, water planning and suitable equipment should be central to preparation for a journey of this scale. French is Corsica’s official and most widely spoken language, while Corsican is also recognized as a regional language; French is a useful starting point for local logistical enquiries.
Route options
- Full traverse: Calenzana to Conca180 kmVery demanding mountain traverse over rugged terrain.
Follow the GR20 south through Corsica’s mountains, covering most of the island’s length. The full route involves around 12,000 to 13,000 metres of climbing and descent over rugged terrain.
- Full traverse: Conca to Calenzana180 kmVery demanding mountain traverse over rugged terrain.
Walk the same mountain traverse in the opposite direction, starting at the southern endpoint and finishing in the north. Reversing direction retains the route’s substantial distance and elevation demands.
Sample itineraries
- Calenzana: northern-end introduction · 1 day
Use Calenzana, the GR20's northern endpoint, for a conservative out-and-back on the trail. Choose a turnaround based on terrain, weather and remaining daylight rather than a fixed distance. This is a short-trip concept, not a verified stage plan; confirm local access before setting out.
- Conca: southern-end introduction · 1 day
Start at Conca, the southern endpoint, for an out-and-back introduction to the GR20. Keep the objective within the group's ability and return along the same trail. Do not assume the southern end is easy; check local terrain and conditions before choosing how far to walk.
Seasonal conditions
Spring
Spring; timing depends on mountain conditions
Plan around conditions in Corsica's mountains rather than weather at the coast. Check current trail conditions and the mountain forecast before committing to a section; a calendar season alone does not establish whether the route is suitable.
Summer
Summer; choose walking hours around the forecast
Account for heat, sun exposure and water needs when planning strenuous days. The rugged terrain and substantial elevation change make ambitious schedules difficult to recover from. Confirm water availability rather than assuming supplies along the trail.
Fall
Fall; plan around available daylight
Allow generous time for rugged ground as daylight decreases. Check the mountain forecast and carry layers for changing temperatures. Do not assume access or overnight services remain available without checking.
Winter
Winter; assess current mountain conditions
Treat a winter visit as a separate mountain-planning problem, not a summer itinerary with extra clothing. Establish current trail conditions, daylight limits and equipment requirements before deciding whether any section matches the group's skills.
| Season | Window | Conditions |
|---|---|---|
| Spring | Spring; timing depends on mountain conditions | Plan around conditions in Corsica's mountains rather than weather at the coast. Check current trail conditions and the mountain forecast before committing to a section; a calendar season alone does not establish whether the route is suitable. |
| Summer | Summer; choose walking hours around the forecast | Account for heat, sun exposure and water needs when planning strenuous days. The rugged terrain and substantial elevation change make ambitious schedules difficult to recover from. Confirm water availability rather than assuming supplies along the trail. |
| Fall | Fall; plan around available daylight | Allow generous time for rugged ground as daylight decreases. Check the mountain forecast and carry layers for changing temperatures. Do not assume access or overnight services remain available without checking. |
| Winter | Winter; assess current mountain conditions | Treat a winter visit as a separate mountain-planning problem, not a summer itinerary with extra clothing. Establish current trail conditions, daylight limits and equipment requirements before deciding whether any section matches the group's skills. |
Permits, fees & closures
Confirm current GR20 permit requirements and overnight-use rules with the managing agency before travel.
Confirm current permits, fees, and closures with the managing agency before you go.
Hazards & regulations
- Rugged terrain can slow progress and increase the consequences of a misplaced step.
- Around 12,000–13,000 metres of climbing and descent across the route create a substantial cumulative physical load.
- The 180 km traverse requires realistic pacing; fatigue can undermine footing and decision-making.
- Mountain weather and temperature changes require a forecast-led plan and clothing suitable for changing conditions.
What to pack for GR20, Corsica
- Well-tested footwear with dependable grip
- Comfortable hiking socks
- Blister-care supplies
- Waterproof outer layer
- Insulating layer
- Sun hat and sunscreen
- Detailed GR20 mapping and offline navigation
- Headlamp and spare power
- Water-carrying capacity matched to confirmed supply points
- Food reserve and first-aid kit
GR20, Corsica FAQ
- Where does the GR20 start and finish?
- Its endpoints are Calenzana in northern Corsica and Conca in the south. The trail traverses Corsica's mountains and runs most of the length of the island.
- How long is the GR20?
- The route covers 180 km, with around 12,000–13,000 metres of climbing and descent over rugged terrain. Distance alone is a poor guide to the effort involved.
- Is the GR20 suitable for a first long-distance hike?
- Its rugged ground and substantial climbing make it a demanding choice. Build experience with consecutive strenuous walking days and test footwear and pack weight beforehand. A short, conservative outing can help assess readiness without committing to the full traverse.
- How many days should be allowed for the full route?
- Set the duration using verified stage information, overnight arrangements and the group's pace on rugged ground. Do not calculate a schedule from the 180 km distance alone; the climbing and descent are central to the workload.
- Can the GR20 be sampled without walking the entire trail?
- An endpoint-based out-and-back offers a conservative planning option. Calenzana and Conca are the named endpoints. Confirm local access and conditions, then select a turnaround that leaves ample time and energy for the return.