The Pyrenees — Sea to Sea

A ~30-day Atlantic-to-Mediterranean traverse braiding the HRP high line with the GR10 and GR11, leg by leg between resupply towns.

The Pyrenees · Hendaye to Banyuls

~30 days · ~800 km, give or take · 6 legs · 7 resupply towns · ~25 nights camping · Fast pace

Loop: Hendaye → Lescun → Gavarnie → Luchon → Andorra → Puigcerdà → Canigou → Banyuls

Atlantic to Mediterranean in about thirty days, braiding the high, unmarked HRP with the waymarked GR10 in France and GR11 in Spain, and choosing the line each evening by the forecast and the state of your legs.

THE SHAPE OF THE TRIP

Five summits on the way, none needing technical kit in normal August conditions: Pic d'Anie, Grande Fache, Petit Vignemale, Taillon by the Brèche de Roland, and Canigou to close.

Camping first, about 25 nights, with guarded refuges and gîtes used on purpose: storms, laundry, a shower, a dinner someone else cooked.

~1,400–1,700 m of ascent a day to finish in under 30. Waymarked ground is where you bank distance.

One planned rest day, at Luchon, around the midpoint. Take it even if you feel fine.

THE BASES

HRP · the high line — unmarked · GPS + map. The drama, on the border ridge. Take it on stable mornings with legs to spare.

GR10 · France — waymarked · lower · gîtes. Drop here for storms, rest, a bed and easy resupply. Villages come often.

GR11 · Spain — waymarked · rugged · drier. The southern way round when the French side is sitting in cloud.

Resupply anchors — 7 towns · west → east. Lescun, Gavarnie, Barèges/Luz, Luchon, Andorra, Puigcerdà, Núria. Extra village shops on the GR stretches.

DAY 1 — days 1–5 · Hendaye → Lescun · Basque Country

Green hills, stone circles, the first real mountains

The Basque section is lower, greener, hotter and more humid than anything later. The HRP and GR10 run close or together much of the way; take whichever suits the heat. Start early every day.

La Rhune and the frontier ridges above Sare: prehistoric stone circles and dolmens on the grazing land.

Col d'Ibañeta above Roncesvalles, where the route crosses the Camino de Santiago and Roland's pass.

The Iraty forest, one of Europe's largest beech forests, then the limestone of the Pic d'Orhy, the first 2,000 m summit.

Ossau-Iraty cheese bought from shepherds at their summer huts (cayolars) when they're selling.

Season: August cloud can sit on the Basque hills for days. Good waymarking on the GR10 makes that a nuisance, not a hazard.

Photo: Pottoka ponies on a misty Basque ridge, or the Iraty beeches

Pacing: easy navigation, hard humidity. Your legs adapt here; don't bank big days yet.

DAY 2 — days 6–11 · Lescun → Gavarnie · Béarn & Bigorre

Anie, Ossau, Balaïtous, Vignemale

The mountains become granite and the HRP becomes the HRP: boulder fields, cols over 2,500 m, lakes to camp beside. This is the leg the whole trip is for. Summit 1 on the way in, 2 and 3 at the end.

Pic d'Anie (2,504 m): a limestone karst dome above Lescun, the westernmost big summit. moderate, rough karst

Under the Pic du Midi d'Ossau, the Pyrenees' most recognisable peak, then the lakes below the Balaïtous around Arrémoulit. scramble on HRP line

Grande Fache (3,005 m): the first 3,000er, from the Marcadau side. scramble

Petit Vignemale (3,032 m): a short ascent from the Hourquette d'Ossoue by the Bayssellance refuge, with the Vignemale north face across the valley. The Grand Vignemale (3,298 m) only if the Ossoue glacier is in condition and you carry crampons and know how to use them. conditional

Henry Russell's caves on the Vignemale's flanks. The highest of them sits just below the Grand Vignemale summit; ask the Bayssellance guardian which ones are within reach of your line.

Season: most years the snow is gone by August, but north facing gullies and cols can hold hard snow into the month. check locally

Photo: Vignemale north face from the Oulettes de Gaube, or a lake camp below the Balaïtous

Pacing: the hardest leg — most HRP boulder terrain, most 3,000 m ambition. If storms build for two days running, drop to the GR10 via Cauterets and pick the high line up again at Gavarnie.

DAY 3 — days 12–16 · Gavarnie → Luchon · Bigorre & Aragon

Through Roland's gap

Gavarnie is where all three routes converge: a good place to rebook, reprovision and decide. The HRP swings through Spain here; the GR10 goes north through Luz and Barèges.

Taillon (3,144 m) via the Brèche de Roland: one of the easiest 3,000 m summits in the range, a walk up from the gap. Go at dawn from the Sarradets refuge side. moderate walk, some snow patches

Góriz, the Spanish refuge below Monte Perdido, if you drop into Ordesa. Camping only on its designated area and only by online booking. must book

The HRP east via the Cirque de Troumouse and the Barroude lakes, or the GR10 via Barèges and the Néouvielle lakes, which is gentler with more beds. Both reach Luchon.

Photo: Walking through the Brèche de Roland toward Spain

Pacing: pick the GR10 if the Vignemale leg took more out of you than planned. You'll need the reserves for leg 5.

DAY 4 — days 17 · Bagnères-de-Luchon

The midpoint. Take the day.

Luchon is a spa town with the full kit of civilisation: supermarkets, pharmacy, ATMs, outdoor shops, laundry and thermal baths. Eat twice at lunch.

Full restock, ATM, replace anything worn out. The next leg is the most remote on the route.

A proper sit-down dinner. Your appetite is now a problem for other people.

Pacing: rest day, planned — not optional.

DAY 5 — days 18–23 · Luchon → Andorra · Aran, Pallars, Ariège

The remote middle

Fewer villages, longer carries, bear country, and the range at its wildest. Resupply options thin out between the Val d'Aran and Andorra, so carry more food here than anywhere else.

The lakes of the Aran and Pallars high country, cols one after another, few people.

Pica d'Estats (3,143 m), Catalonia's highest summit, a short detour from the HRP line. Only if you're ahead. optional

Refugi del Comapedrosa above Arinsal as the gate into Andorra: guarded, 45 places, half board €55.80 in 2026. verified

Photo: A high lake camp in the Pallars with no one else in sight

Pacing: longest carries of the trip. Plan food for the full leg before leaving Luchon. Bear country: keep food in the tent vestibule, never cook where you sleep.

DAY 6 — days 24–25 · Andorra → Puigcerdà · Cerdanya

Shops, then the Cerdanya

Andorra is the best resupply on the whole route: real supermarkets and gear shops. It is also outside the EU's roaming rules. Switch mobile data off at the border or pay heavily.

Andorra: restock, replace shoes if they're done, get out. The valley floor is a traffic jam of duty-free shops.

East across the high pastures into the wide, sunny basin of the Cerdanya. Puigcerdà and Bourg-Madame sit on either side of the border.

Pacing: a transition leg. Easier ground, big views, a chance to bank a day.

DAY 7 — days 26–30 · Puigcerdà → Núria → Canigou → Banyuls

Down to the Med

The last leg gets drier, hotter and more exposed to the sun every day as you drop east through schist and cork oak. Dawn starts, always. Carry more water than feels necessary.

Núria: a sanctuary valley reached otherwise only by rack railway. Top-up shopping only.

Canigou (2,784 m): the Catalans' sacred mountain, long believed to be the highest in the range because it rises so abruptly from the plain. The summit chimney is a scramble; the view reaches the sea you're walking to. scramble near top

Banyuls-sur-Mer: walk into the sea. Then a glass of Banyuls, the town's fortified wine, and the train to Perpignan (around 30 minutes). train times: check locally

Season: in late August, fire risk can close forest tracks in the Pyrénées-Orientales. check locally

Photo: First sight of the Mediterranean from the last ridge above Banyuls

Pacing: easy navigation, heavy heat. Water sources thin out east of Canigou; the lower GR routes pass more of them than the high line.

SAFE TO SKIP

The HRP line on a storm afternoon. The GR10 or GR11 is always nearby. Pride isn't a reason to be on a ridge at 3pm in August.

The Grand Vignemale without glacier kit and skills. The Petit Vignemale gives you the view and a 3,000 m summit for an hour's effort.

The Cirque de Gavarnie floor at midday. Crowds, horses, a queue for the waterfall view. You'll see it better from the Brèche side.

Andorra la Vella beyond the supermarket. Duty-free shops and traffic. Restock and climb back out the same day.

Pica d'Estats if you're behind schedule. A detour with a crowded summit. Leg 4 is long enough already.

WHERE TO SLEEP

Lescun & the Vignemale · legs 1–2 — accommodation options below.

Refuge du Pic d'Anie, Lescun · Anchor bed · € · gîte refuge in the village · rating not found — A guarded gîte refuge in the village, listed by the Béarn tourist office. The obvious bed at the first resupply. Prices and opening not confirmed this search. check directly

Refuge de Bayssellance (FFCAM) · High refuge · € · 2,651 m · guarded late May – mid Oct — The base for the Petit Vignemale and a rare roof this high. Bed only €26.50 non-members (2026); half board priced separately. Cash or cheque only, no cards. verified

Gavarnie & Ordesa · leg 3 — accommodation options below.

Chalet refuge La Grange de Holle (FFCAM) · Anchor bed · € · 4.3/5 Tripadvisor (16 reviews) · Route de Boucharo — The club chalet just above the village, with communal dinners and bivouac allowed. About 4.5 km from the Cirque. Reviews like the atmosphere and are mixed on value.

Refugio de Góriz (camping area) · Spanish side · €17.30 / person · max 50 a day · booking mandatory — The only place you may camp in the Ordesa sector. Pitch from one hour before sunset, strike by one hour after sunrise; hot shower included; ID checked. verified

Andorra, Núria & Canigou · legs 4–6 — accommodation options below.

Refugi del Comapedrosa · High refuge · €€ · 2,260 m · half board €55.80 (2026) · 45 places — Guarded 1 June – 12 October. The entry to Andorra from the west; book ahead for July and August. verified

Alberg Núria Xanascat (Pic de l'Àliga) · Anchor bed · € · youth hostel above the sanctuary · rating not checked — The Catalan government hostel on the ridge above Núria, reached by cable car or on foot. Existence confirmed; prices and ratings not checked this search.

Refuge des Cortalets (Canigou) is under reconstruction. In 2026 it ran as a temporary 20 place tent from 28 June to the end of September, with no showers or drinking water, and priority for multi day trekkers. The works are planned to last three years, so check before counting on it. The GR10 routes round it. verified

KIT & CARRY

Base weight — 8–10 kg — Pack minus food, water, fuel. Less if you lean on gîtes and refuges.

Consumables — +2–4 kg — Carries are shorter on GR sections than a pure HRP.

Loaded — 11–14 kg — Keep under about 20–25% of body weight.

Pack & carry — ~1.5–2 kg — 45–50 L pack, liner or dry bags, folding poles.

Sleep system — ~1.3–1.8 kg — Bag comfort 0–5 °C, mat R ≥ 3, liner for huts, earplugs.

Clothing packed — ~1.5–2 kg — Hardshell + overtrousers, insulated jacket, fleece, warm hat, gloves, dry sleep layer.

Navigation — ~0.4 kg — Phone with all three GPX tracks, 10,000 mAh power bank, paper maps + compass for HRP legs.

Water & cooking — ~0.8–1 kg — 2–3 L capacity, filter or tabs, stove (skip if fully hut-based).

Safety — ~0.5 kg — First aid + blister kit, headtorch, emergency bivvy, whistle, PLB or satellite messenger for the high line.

Shelter: The flexible choice: a trekking pole tent of 0.6–1.0 kg. Because you can always drop to a waymarked valley for a bed, you don't need a 1.5 kg storm tent. A light shelter plus the willingness to descend covers you.

Food: About 700–900 g a day, fat first. Buy freeze-dried dinners, bars and electrolytes in a city before the start; buy saucisson, hard cheese, tortillas, nuts and couscous on the way. On the GR10, a gîte dinner and breakfast cuts what you carry.

Electrolytes: Sodium is the one that matters in August heat. One bottle with a tab, one plain. A bouillon cube in the evening: cheap salt, warmth, morale.

Training: Downhill and eccentric quad work first (step-downs, descent-heavy walks), then zone 2 base, hill repeats, ankle stability for scree. Taper into the start; break boots in completely.

CONDITIONS & PRACTICAL

Storms: August is peak afternoon thunderstorm season. Dawn starts; off high ground by early afternoon, or take the GR that day.

Bivouac rules (French national park): Tent up after 19:00, down before 09:00, and only more than an hour's walk from the park boundary or any road. Designated bivouac areas around some refuges. verified

Spain & Andorra: Rules vary by park. In Ordesa you may camp only at Góriz, booked. Elsewhere: pitch late, leave early, leave nothing. check locally

Money: Euro everywhere, Andorra included. Carry €200–300 cash: refuges, gîtes and village shops are often cash only or have no signal. ATMs: Luchon, Andorra, Puigcerdà/Bourg-Madame. Half board in gîtes and refuges is roughly €45–60 a night. check locally

Papers: ID or passport, travel insurance that covers mountain rescue, EHIC/GHIC, printed club card if you have one for refuge discounts.

Emergency: 112 works in France, Spain and Andorra. Note your position before you call.

Snow & water: Snow is mostly gone from the high route by August; check before committing to north facing HRP variants. Water gets scarcer as you go higher and further east.

Getting home: Hendaye and Banyuls are both on the French rail network. From Banyuls, trains run to Perpignan for onward connections. check locally

FIELD NOTES

Patous: The white guard dogs with the flocks are working, not pets. Stop, walk wide round the sheep, keep poles low and don't wave them, don't stare the dog down. It will escort you out and go back.

Refuge manners: Boots off at the door, reserve by phone or online, arrive before dinner or call. Dinner is communal and at a fixed time. The guardian's advice on weather is worth more than your app.

Languages: You'll cross Basque, French, Occitan (Aranese in the Val d'Aran), Aragonese Spanish and Catalan areas. A word of the local language earns a lot. Don't call Basques or Catalans simply "Spanish" or "French".

Gates & livestock: Close every gate you open. Cows with calves deserve the same wide berth as the dogs.

POCKET TRAIL PHRASES

English · French · Spanish (Catalan / Basque where it helps)

Hello — Bonjour · Hola — Basque: Kaixo (KAI-sho)