The GT20 , also known by its Corsican name A Traversata Maiò , represents the ultimate cycling adventure in Corsica. This grand crossing of the island connects Bastia to Bonifacio over approximately 600 kilometers of winding roads and breathtaking landscapes. Inaugurated in 2019, this cycle touring route has already established itself as a benchmark for cycling enthusiasts wishing to discover the Isle of Beauty in a different way.
It’s important to know that the GT20 prioritizes quiet secondary and departmental roads , guaranteeing safety and peace of mind for cyclists. By 2025, this route is attracting more and more cycle tourists thanks to its improved signage and enhanced facilities .
Furthermore, the option to complete these 12 stages in 6, 8, or 12 days, depending on your fitness level, allows everyone to adapt to their physical abilities and availability. This guide will help you prepare for your trek by detailing the essential stages, the elevation changes to anticipate , camping accommodation options, and tips for efficiently managing your luggage.
Route and stages of the GT20: detailed itinerary of the crossing
Organizing your Corsican crossing requires careful planning of the stages and a precise understanding of the route. The GT20 is divided into twelve distinct sections, each revealing unique landscapes between sea and mountains .
North to south route: the 12 official stages
The GT20 route traditionally begins in Bastia and ends in Bonifacio, although the reverse is perfectly feasible. The stages are organized according to a logical structure that respects accommodation availability and reasonable distances for cycle touring .
The opening stage leads from Bastia to Centuri over 58 kilometers, allowing for a gradual warm-up with the discovery of Cap Corse . This first section alternates between moderate climbs and coastal stretches, ideal for acclimatizing to the Corsican terrain. As such, it provides an excellent introduction to the GT20 adventure.
The route continues from Centuri to Saint-Florent (58 km), then from Saint-Florent to Belgodère (61 km), before reaching Calenzana from Belgodère (43 km). These stages cross the Balagne, an iconic region with hilltop villages and exceptional Mediterranean panoramas.
The route continues westward from Calenzana to Galéria (31 km), then from Galéria to Porto (51 km). These shorter sections compensate with their technical demands, particularly the approach to Porto and its famous Calanques of Piana.
Most technical sections and high points
The central section of the GT20 presents the most significant technical challenges, with the Porto to Col de Vergio stage (34 km). This section climbs to an altitude of 1,467 meters, the highest point of the entire route. It should be noted that this ascent is gradual but sustained, requiring a good level of fitness.
The next stage, from Col de Vergio to Corte (50 km), offers a technical descent followed by a climb back up to the historic capital of Corsica. Corte is a must-see destination, rich in history and perfectly equipped to welcome cyclists.
The end of the route goes from Corte to Ghisoni (57 km), Ghisoni to Zicavo (45 km), Zicavo to Zonza (44 km), to end with the longest stage Zonza to Bonifacio (71 km). This last section, although demanding due to its distance, fortunately benefits from a mainly descending profile towards the southern tip of the island.
Elevation changes and technical difficulties: understanding the altimetric profile
Managing elevation changes is the most crucial aspect for successfully completing the GT20. With nearly 10,000 meters of positive elevation gain over the entire route, this crossing demands serious physical preparation and an appropriate pace strategy.
General altimetric profile and main mountain passes
The total elevation gain of the GT20 is unevenly distributed across the sections, with significant concentrations on certain key stages. The highest point at the Col de Vergio, at 1,467 meters, represents the major challenge of the crossing. Nevertheless, the ascent from Porto is gradual, allowing for progressive acclimatization to the altitude.
Other mountain passes punctuate the route, notably the Col de Bacino with its breathtaking views of the Gulf of Porto-Vecchio . These high-altitude sections present both technical challenges and exceptional panoramic rewards.
Note that the overall profile favors morning climbs when temperatures are still mild. This natural organization makes it easier to manage effort and limits the risk of overheating , which is particularly beneficial during the summer season.
Most demanding passages and approach strategies
Certain sections of the GT20 require a specific tactical approach to be completed successfully. The stage towards the Col de Vergio, in particular, demands an early start and careful hydration management .
The climbs in the Alta Rocca region also present significant challenges, with gradients sometimes sustained over several kilometers. These sections require a suitable pace and regular breaks to avoid accumulating fatigue.
Moreover, some technical descents require particular vigilance, especially towards Galéria or on the switchbacks leading to Bonifacio. Controlling braking and choosing safe lines become paramount on these winding sections.
Camping accommodation along the GT20: planning and booking
Organizing camping accommodation is a crucial aspect for a successful GT20, particularly in high season when demand often exceeds available supply.
Recommended campsites per main stage
The Les Îlots d’Or campsite near Porto-Vecchio is a must-visit for cyclists on the GT20. Open from April 17th to October 15th, 2025, it offers specialized packages tailored to the needs of cycle tourists. The GR20 package, starting at €12 per night, includes one person and a tent, ideal for bicycle travelers.
In the Calvi-Balagne region , several establishments specifically cater to GT20 cyclists. These campsites generally offer dedicated services: bike washing area, equipment drying, and route advice.
the Merendella campsite in Haute-Corse has been developing a specialized GT20 offer. This establishment understands the specific needs of cycle tourists and adapts its services accordingly: flexible hours, enhanced breakfast, emergency bike repair.
Other campsites are located along the route and offer preferential rates for holders of the GT20 guidebook. These discounts encourage cycle touring and facilitate budget planning for trips.
Booking strategies and optimal periods
Booking in advance becomes essential during peak season, particularly between July and August. Be aware that campsites often apply minimum stay requirements during this period: 7 consecutive nights in July and August, and a minimum of 3 nights the rest of the year.
Prices vary significantly depending on the time of year: from €12 in the low season to a maximum of €38 in the height of August for premium berths . This price variability directly impacts the overall cost of the crossing.
In addition, some campsites offer all-inclusive packages including accommodation, enhanced breakfast, and sometimes luggage transport. These packages simplify the process but require booking well in advance . Here are the essential elements to check when booking:
- availability of bicycle services (washing, drying, basic repairs);
- flexible arrival times to accommodate cyclists’ schedules;
- possibility of secure storage of bicycles overnight;
- access to a power supply to recharge equipment;
- proximity to shops for energy supplies;
- Quality of sanitary facilities and hot showers guaranteed.
These criteria guarantee a comfortable stay and optimal recovery between each stage of the GT20 .
Luggage and equipment management: practical solutions for the GT20
Optimizing luggage transport is a key factor in the comfort and success of your cycling trip. Several solutions are available to cycle tourists depending on their budget and comfort requirements .
Carrier solutions and specialized services
GT20-BAGS service offered by Cycling Corsica is revolutionizing the approach to cycle touring in Corsica. This cycling mail carrier transports your luggage from stage to stage according to a strict schedule : collection from 9am, delivery before 3pm to the next accommodation.
The tiered pricing encourages group travel: €30 for one piece of luggage, €50 for two pieces, and up to €100 for five pieces of luggage per stage. This option allows you to travel light while still enjoying the comfort of a full set of equipment.
It should be noted that this service operates exclusively with hotels, bed and breakfasts, and campsites , excluding Airbnb rentals. This limitation, however, guarantees the reliability of the pickup and delivery slots.
Other providers are developing similar offers, particularly for all-inclusive packages that include half-board accommodation and standard luggage transport. These high-end packages completely simplify the logistical arrangements.
Essential equipment and weight optimization
The equipment for the GT20 must combine versatility and lightness , especially if you opt for independent carrying. The 20 kg limit per bag necessitates a rigorous selection of gear.
The basic equipment includes technical clothing adapted to Corsican climatic variations: light clothing for hot days, a waterproof windbreaker for passages at altitude, and essential rain equipment.
For bike maintenance, opt for a complete repair kit : spare inner tubes, tire levers, a mini-pump, essential Allen wrenches, and a spare chain if needed. These items can prevent your adventure from being cut short.
Camping equipment also requires drastic optimization: an ultralight tent, a sleeping bag adapted to Corsican nighttime temperatures, and a compact inflatable mattress. Every gram saved is felt on the climbs.
Practical advice and preparation: optimizing your GT20 crossing
The success of your GT20 trip largely depends on the quality of your preparation beforehand. Several aspects deserve particular attention to transform this adventure into an unforgettable memory.
Best time of year and weather conditions
The optimal season extends from May to September, with important variations depending on your priorities. Spring (May-June) offers mild temperatures and nature in full bloom, but with a higher risk of rainfall . While summer generally guarantees stable weather, temperatures can become challenging, particularly in exposed areas .
Autumn (September-October) is often the most pleasant time to visit : temperatures are still mild, the light is exceptional, and there are fewer tourists. This season allows you to fully enjoy the scenery without suffering from the summer heat.
You should be aware that weather conditions in Corsica can change rapidly, especially in the mountains. The Vergio Pass can experience significant temperature differences compared to coastal areas , requiring appropriate equipment.
Physical condition required and specific training
The GT20 requires a solid level of fitness, but not necessarily a competitive level. Your preparatory training should include regular long runs, ideally on hilly terrain to get used to prolonged efforts.
Endurance is the primary quality to develop : the ability to maintain a moderate effort over several hours, managing hydration and nutrition while riding, and recovery between stages. These aspects are worked on progressively during training.
For example, a moderately trained cyclist should be able to complete rides of 80 kilometers with 1500 meters of elevation gain without major difficulty before considering the GT20. This ability guarantees a significant safety margin on the most demanding stages .
E-bike enthusiasts can also consider the GT20 with the appropriate preparation. Charging stations available in each stage town allow for this, although the range should be carefully calculated based on the terrain.
The GT20 represents an exceptional cycling adventure that reveals the diversity and beauty of the Corsican landscapes. This 600-kilometer route between Bastia and Bonifacio is an achievable challenge for well-prepared cyclists , whether they opt for a traditional or electric bike.
It’s worth noting that the success of this undertaking relies on meticulous planning , particularly regarding campsite accommodation and luggage management. Furthermore, specialized services like GT20-BAGS significantly simplify the logistical organization, allowing cyclists to focus on the pleasure of cycling across Corsica.
The fact is that this long-distance route is gradually establishing itself as the cycling equivalent of the legendary GR20 , with the added advantage of being accessible year-round, weather permitting. Thus, the GT20 offers a complete immersion in Corsican culture and landscapes , creating unforgettable memories for all those who love cycle touring and authentically discovering exceptional regions.
