Across the mountains of Corsica from Calenzana to Conca: the park's sixteen stages, refuge to refuge, with each night's 2026 season and booking, the train at Vizzavona half way, and what is closed.
Best season: Mid-May to early October, while the refuges are guarded. The park's refuges are guarded, with meals, from 16 May to 4 October 2026; it has not published 2027 yet. Snow can lie at the Brèche de Capitellu, between Manganu and Petra Piana, early in the season. From mid-June to mid-September the massifs can be closed at any time of day when the fire risk is severe; the fire-risk map is updated at 18:00 for the next day. Before you go
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Plan your days
Your dates
Checking the seasons, closures and current conditions for today…
The park's sixteen stages, each from one refuge or bergerie to the next. Stages 4 and 5 were reported closed after the fire of July 2026: check them with the park first. Choose a plan, or pick your own start, finish and nights below.
Hut seasons as published. 2026: all 10 huts open 16 May to 4 October.
Each day in its own colour, numbered where it starts; the rest of the GR20 in grey. Select a day for its elevation and 3D flyover.
Make your own plan
Changing where you stay suggests a new number of days: the fewest that keep each day under 8 h of walking and in daylight, where a place to stay allows.
Choose your nights (15 nights)
Days end where the route has a stay, a camp or a village.
6 h 30Parc naturel régional de Corse time; our estimate 4 h 34
Stage 1: The park says no departure from Calenzana is allowed after 11:00, under a municipal order. No water after the Ortiventi fountain until the refuge. Ortu di u Piobbu has no dormitory: you sleep in your own tent or one rented from the park.
Overnight
Ortu di u Piobbu
Camping spot · 1,520 m · Parc naturel régional de Corse
Number of places not published · Restaurant meals No dormitory: camping only, in your own tent or one rented from the park. The guardian serves dinner and breakfast; a small shop and running water.
Booking
Book onlineBook every night online with the park before you go. There are no bunks here: in 2026 a pitch for your own tent is €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water. No water on the next stage to Ascu: fill up here.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
8 hParc naturel régional de Corse time; our estimate 4 h 23
Closed on set days: km 0–8.43 of stage 4. Reported closed by prefectural order from 14 July 2026, after the Albertacce fire (FFRandonnée, 17 July 2026). The park's own pages do not mention it and we found no reopening: ask the park before you walk it.
Stage 4: Reported closed by prefectural order from 14 July 2026, after the Albertacce fire; we found no reopening by 25 September 2026, and the park's own pages do not mention it. The official route avoids the Cirque de la Solitude, closed since 2015, and climbs almost 1,200 m over the Pointe des Éboulis and Bocca Crucetta.
Overnight
Tighjettu
Mountain refuge · 1,683 m · Parc naturel régional de Corse
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
4 hParc naturel régional de Corse time; our estimate 2 h 36
Closed on set days: km 0–6.38 of stage 5. Reported closed by prefectural order from 14 July 2026, after the Albertacce fire (FFRandonnée, 17 July 2026). The park's own pages do not mention it and we found no reopening: ask the park before you walk it.
Stage 5: Reported closed with stage 4 from 14 July 2026, after the Albertacce fire; we found no reopening by 25 September 2026. The park ran a shuttle from Haut-Asco to Vergio.
Overnight
Ciottulu di i Mori
Mountain refuge · 1,991 m · Parc naturel régional de Corse
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
16 places in total · Restaurant meals Only 16 beds indoors, and a large flat camping area. Dinner, breakfast and packed lunches from the guardian, a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
The half-way village, on the Bastia to Ajaccio railway. Private hotels and gîtes by the station and at Foce di Vizzavona: book directly with them (the park lists their phone numbers); none is part of the park booking.
Or a room in the village. Find your own accommodation; TrailSplits has not checked what is open.
Booking requestA private gîte, not part of the park booking: book directly, a deposit is asked. Its price list is not dated, so check the price when you book.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water. The stage from Prati is short of water in July and August.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
4 h 25Parc naturel régional de Corse time; our estimate 3 h 07
Stage 13: The park ends this stage at the private bergeries of the Cuscionu plateau: Matalza here, with Basseta before it and I Croci after, each booked on its own site.
12 places in total · Half board offered 12 dormitory beds and 30 tents, with meals.
Booking
Book onlineA private refuge on the Cuscionu plateau, where the park ends stage 13 ("the private bergeries"). Book on its own site; its prices are not dated.
Number of places not published · Restaurant meals No dormitory: camping only, in your own tent or one rented from the park. The guardian serves dinner and breakfast; a small shop and running water.
Booking
Book onlineBook every night online with the park before you go. There are no bunks here: in 2026 a pitch for your own tent is €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Number of places not published · Restaurant meals Dinner, breakfast and packed lunches from the guardian (order by 18:00), a small shop, running water. The last stage is hot: fill your bottles.
Booking
Book onlineBook every night online with the park before you go, your own tent included: in 2026 a bunk is €20, a pitch for your own tent €12 a person, a rented tent €27 for one or €39 for two. The place is held until 19:00; changes up to 48 hours ahead; a full refund only if you cancel two months ahead. Meals are ordered on arrival and paid on site in cash or by cheque.
Days end at a stage end with a refuge or a village, or in a village the route passes through. Walking times are the Parc naturel régional de Corse's published times where it gives one, with our estimate beside it; a day that walks part of a stage gets a share of the stage's time by distance and climb. Running times use 7.5 km/h plus one hour per 700 m of climb: a steady reference, not a prediction. Daylight is sunrise to sunset where the day starts; the time left is for breaks, meals and delays.Refuge dates come from the operator's own pages; when they are not published, we say so. For villages we count the places to stay OpenStreetMap lists; we have not checked which are open. A plan is not a booking: reserve every night before you commit to these day lengths.
Huts and stays, stage by stage
Where each stage ends, the 2026 and 2027 seasons the operator publishes, and how to book. Read from the operators' pages on 25 September 2026; each stage page shows the sources and the grade profile.
Loading the forecast for low point (253 m) and high point (2,595 m)…
Weather by month
Typical weather on this trail: at the lowest point (253 m) and the highest point (2,595 m). Select a month to see why it is rated as it is.
Monthly climate averages and daylight
Month
Weather
Poor
Poor
Mixed
Mixed
Mixed
Good
Good
Good
Good
Good
Mixed
Poor
Stages rated good on typical weather
0/16
0/16
1/16
3/16
15/16
16/16
14/16
14/16
16/16
15/16
4/16
0/16
High point, day / night
-3°/-6°
-3°/-6°
-1°/-4°
2°/-2°
7°/2°
11°/5°
15°/9°
15°/9°
10°/5°
6°/3°
2°/-1°
-2°/-4°
Low point, day / night
13°/6°
13°/6°
15°/8°
18°/10°
22°/14°
26°/18°
30°/21°
30°/21°
26°/17°
22°/14°
17°/11°
14°/8°
Rain, mm
102
80
78
73
63
42
17
24
73
120
158
122
Snow at high point
Likely
Likely
Likely
Likely
Likely
–
–
–
–
–
Possible
Likely
Daylight
9 h 26
10 h 34
11 h 51
13 h 19
14 h 32
15 h 13
14 h 58
13 h 56
12 h 33
11 h 09
9 h 51
9 h 08
Source: TerraClimate 1991–2020 monthly averages. Averages for the area at each point’s elevation (4 km grid, corrected for height). Not a forecast or a report of current trail conditions. Snow at the high point is estimated with a simple snowpack model from these temperatures and precipitation, not observed; steep islands and high summits can hold more snow than it shows. Daylight is for the 15th of each month. Hut, transport and park seasons are separate: check them for your dates.
Before you go
Prepare for the GR 20
Arrange your stays, food and travel first, then check conditions again near departure.
Book every night with the park
The park takes bookings for every night in its refuges, your own tent included, and camping elsewhere along the route is forbidden. Vizzavona, E Capanelle, the Cuscionu bergeries and Castel di Verghju are private and booked directly. Each night below shows its 2026 season and how to book.
Book before you go
Every night in the park's refuges must be booked online, including a pitch for your own tent: in 2026 €20 for a bunk, €12 to pitch your tent, €27 or €39 for a rented one. Places are held until 19:00, and the guardian cannot change your dates on the spot. The FFRandonnée says Ortu di u Piobbu, Carrozzu and Usciolu fill first.
The FFRandonnée reported on 17 July 2026 that the prefecture had closed Ascu Stagnu to Tighjettu and Tighjettu to Ciottulu di i Mori from 14 July, after the Albertacce fire. We found no reopening by 25 September 2026, and the park's own pages do not mention it. Ask the park before you plan to walk them.
No fires and no smoking in the forests and mountains from 15 June to 30 September. When the fire risk is severe the massifs can be closed at any time of day; the fire-risk map is updated at 18:00 for the next day. No departure from Calenzana is allowed after 11:00.
Violent storms happen even in summer: check the mountain forecast and be ready to turn back. Early in the season snow lies at the Brèche de Capitellu. The park's list of kit to carry is on its GR 20 page.
Stages 1, 2, 3 and 12 are short of water; fill up at the refuges and the springs the park names. The phone signal is unreliable at most refuges, which have an emergency phone while guarded. Call 112 in an emergency.
Google Maps journey searches, not confirmed services. A mountain endpoint may need a booked transfer or an additional walk.
To Calenzana from Calvi
Les Beaux Voyages runs Calvi to Calenzana; its page now shows only the school-term bus at 15:45 on weekdays, so check the summer times with the operator.
Vizzavona station is on the Bastia to Ajaccio line of the Chemins de fer de la Corse, with about five trains a day each way in the autumn 2026 timetable. It is the way in or out between the two halves.
In summer buses C3 and C4 leave Col de Bavella in the morning for Propriano and Ajaccio. From Conca the park lists a shuttle on request to Sainte-Lucie and Porto-Vecchio: call ahead.
Prepare each stage while you still have a connection: the park says the phone signal is unreliable at most refuges.
Keep your route and maps on your phone for places without a signal. For multi-day trips, prepare them in the installed TrailSplits app.
Open this trail in the app.Install TrailSplits, then open this trail there. On iPhone, downloads in a browser may not be available in the installed app.
Choose your route or stages. Choose Prepare offline above. Wait for the route and maps to finish downloading.
Try it before leaving coverage. Switch offline, close and reopen the app, then use My Hikes to start navigation. Repeat for every part you will need.
Saving a bookmark is not a map download. Storage can be cleared by your device; keep a backup map for remote trips.
Route & sources
About this map
The park walks the GR 20 in sixteen stages, north to south; the FFRandonnée's guide gives 200 km. The line here is the route on OpenStreetMap (relation 12484370, version 32, planet of 21 September 2026), 183.6 km, cut at the park's stage ends. It crosses the Pointe des Éboulis where the Cirque de la Solitude has been closed since 2015. The short walks from the line to each refuge are extra. The park gives times, not distances: the times shown are its north-to-south times.
Official guidance and mapped-source comparison checked 25 September 2026. Map data is a route reference, not confirmation of today's path, weather or accommodation availability.