Hiking Gear for Corsica

Packing for hiking in Corsica is a balancing act between safety, comfort and lightness. The island demands conditions found nowhere else in mainland France: abrasive granite that wears out soles prematurely, intense coastal heat, sudden mountain storms, sparse water sources on some stretches and technical terrain with rock slabs, scree and boulder fields. A well-equipped hiker enjoys every metre of trail; a poorly prepared one turns adventure into ordeal. Here is the complete, field-tested checklist.

Boots: the number one investment

In Corsica, hiking boots are not a detail. The granite terrain, found on most trails, is both abrasive (it wears soles faster than any other substrate) and technical (tilted slabs, loose blocks, scrambling sections). Poor footwear is the leading cause of abandonment on the GR20.

Essential features

• Ankle support: ankle support is critical on Corsican terrain. Sprains are common on rocky trails, especially on descents. Save low-cut shoes for easy, well-groomed paths.
• Deep-lugged soles: choose Vibram or equivalent soles with aggressive tread. Grip on dry granite is excellent, but wet granite becomes extremely slippery: a good sole makes all the difference.
• Stiffness: a semi-rigid sole offers the best compromise between rock protection and walking comfort. Too soft and your feet take a beating from impacts; too stiff and you lose the natural foot roll.
• Waterproofing: a Gore-Tex or similar membrane protects during stream crossings and sudden storms. The trade-off: breathability drops in intense heat. For summer low-altitude hikes, highly breathable non-waterproof boots may be preferable.

Key advice: never set off in brand-new boots. Break them in for at least 50-100 km before your Corsica trip. Blisters are the number one scourge of hikers, and Corsican terrain is not the place to test new footwear.

The backpack: choosing and packing wisely

Day hike (25-35 litres)

For 4-8 hour outings, a 25-35 litre pack is sufficient. It should feature a padded hip belt for transferring weight to the hips (essential once the pack exceeds 5 kg), a ventilated back panel (a tensioned mesh system like Deuter Aircontact or Osprey AG is outstanding in the Corsican heat) and an integrated rain cover or one supplied separately.

Multi-day trek (50-65 litres)

For the GR20 or the Mare a Mare traversals, a 50-65 litre pack is needed. Total loaded weight should not exceed 12-14 kg for men and 10-12 kg for women, including food and water. Every superfluous gram exacts a heavy toll on the steep climbs and technical sections of the GR20. List every item and weigh it: cut anything that is not strictly necessary.

Clothing: the layering system

The three-layer system is the reference for mountain hiking in Corsica, where conditions can swing from blazing sun at 35 degrees C to a 10-degree thunderstorm in the same day.

Base layer (first layer)

A merino wool or technical synthetic t-shirt that wicks moisture. Avoid cotton at all costs: it absorbs sweat, stays wet and causes chills. Merino has the added benefit of not developing odour after several days (a major plus on treks). Pack a long-sleeved shirt for sun protection and evenings at the refuge.

Mid layer (insulation)

A light fleece (200 g/m2) or a lightweight synthetic puffy jacket for breaks, evenings and cool mornings at altitude. In summer, a light fleece generally suffices. In spring and autumn, bring both. Choose compressible models that take up little room in the pack.

Outer layer (protection)

A waterproof, windproof jacket is essential year-round in Corsica. Mountain thunderstorms break without warning, especially on summer afternoons. Choose a lightweight model (300-400 g), breathable (2.5 or 3-layer membrane) with an adjustable hood. Waterproof trousers are a bonus for multi-day treks but often unnecessary for day hikes.

Trousers and shorts

Lightweight, stretchy hiking trousers, ideally convertible to shorts (zip-off legs). Trousers protect against maquis thorns, sun and rocks. In high summer, technical shorts with high socks are often more comfortable on clear, well-groomed trails.

Hydration and food

Water: the absolute priority

Dehydration is the number one danger on summer hikes in Corsica. Carry a strict minimum of 2 litres per person for a 4-6 hour outing, and 3 litres for full days or sections without springs. On exposed coastal trails in full sun, consumption can reach 1 litre per hour.

Carry your supply in a hydration bladder (e.g. CamelBak, 2 litres) supplemented by a hard water bottle (1 litre). The bladder lets you drink regularly without stopping, maintaining good hydration. Add salt or electrolyte tablets to your water in extreme heat to replace what you lose through perspiration.

A portable water filter (Sawyer, Katadyn) or purification tablets (Micropur) are essential for multi-day treks. They allow you to refill from mountain streams safely. On the GR20, springs are marked on the maps but some dry up in late summer.

Trail food

For day hikes, a classic packed lunch works well: sandwich, dried fruit, energy bars, Corsican cheese (brocciu, ewe's milk tomme). Choose foods that tolerate heat. For treks, freeze-dried meals offer the best weight-to-calorie ratio. Supplement with dried fruit and nuts (almonds, walnuts, dried apricots), cereal bars and dark chocolate for energy boosts.

Sun protection and heat

The Corsican sun is formidably intense, especially at altitude where the thinner atmosphere and reflection off granite amplify exposure.

• Sunscreen: SPF 50 minimum, water- and sweat-resistant. Apply before setting off and reapply every 2 hours. Do not forget ears, the back of the neck and the backs of the hands.
• Hat or cap: a wide-brimmed model protects the face, ears and neck. Sahara-style caps with a removable neck shield are ideal.
• Sunglasses: category 3 minimum (category 4 for high mountains and snow). Choose a wraparound model with a retaining cord to avoid losing them on technical passages.
• Buff or bandana: versatile -- it protects the neck from the sun, serves as a sweatband and shields against cool mountain winds.

Navigation and safety

• IGN 1:25,000 map: essential even with a GPS. The IGN Top25 series covers all Corsican trails in remarkable detail. Protect yours in a waterproof sleeve.
• GPS / Mobile app: download offline maps before departure (there is no signal on most mountain trails). IGNrando, Visorando and AllTrails are reliable choices.
• Power bank: 10,000 mAh minimum to keep your phone charged over several days. GPS drains the battery quickly.
• Whistle: built into most modern packs. The international distress signal is six blasts per minute.
• Emergency blanket: lightweight (50 g) and compact, it can be a lifesaver in case of forced immobilisation (injury, extended storm).
• First-aid kit: blister plasters (Compeed-type), elastic bandage, antiseptic, painkillers, tweezers (maquis thorns), haemostatic dressing.

Complete checklist by trip type

Day hike

Multi-day trek (GR20 and long traversals)

In addition to the basic gear, add:

• Sleeping bag: comfort rating 5 degrees C for summer, 0 degrees C for spring and autumn. Down for weight savings, synthetic for moisture resistance.
• Sleeping mat: inflatable (R-value 2 minimum for summer) if bivouacking. Refuges provide mats but not always in sufficient quantity.
• Stove and cookware: a compact gas stove (cartridges are available at GR20 refuges). Lightweight titanium or aluminium cookset.
• Water filter: essential for refilling from streams without carrying 3 litres at all times.
• Head torch: with spare batteries. Pre-dawn starts are common on the GR20 to avoid afternoon storms.
• Change of clothes: one full spare set (t-shirt, underwear, socks). Wash and dry as you go.
• Dry bag: to protect sleeping gear, clothing and electronics inside the pack.

What NOT to pack

The temptation to overpack is the classic trap. Every extra kilogram is paid for in fatigue and joint pain, especially on the technical trails of Corsica. Here is what you can leave at home.

• Cotton clothing: retains moisture, dries slowly and causes chafing.
• Too many changes of clothes: for a trek, two sets alternated (one worn, one drying) are enough.
• Bulky camera gear: a recent smartphone suffices for most situations. If you must bring a camera, an expert compact is the best compromise.
• Standard towel: replace with an ultra-light microfibre towel.
• Paperback books: e-reader or nothing. Every gram counts on the GR20.

Check the best season for hiking in Corsica to tailor your list to the time of year, and find all our tips for planning your excursions. For hikers weighing up guided versus solo, our complete guide details each option.