Two boats, no backtracking
In at St Malo, out at Bilbao. The Biscay ferry sits an hour beyond the Basque coast, so the file runs one way down eight hundred kilometres of shoreline and sails home from the bottom of it. Nothing is driven twice.
01 / MISSION PROFILE
One way down the coast, and a boat home from the far end.
Every other continental file loops back to where it started. This one does not have to, and that changes what three weeks can cover.
COMMITTING
Three pips of five. Flat, easy, well-surfaced driving and the shortest mileage of any three-week file here. What earns the rating is the tide — this coast has real tidal hazard on it — August crowds on islands with one bridge, and a forest that closes on high fire-risk days.
Neither Brittany nor Provence
E02 takes the Channel and the Loire; E05 takes the Mediterranean. This is the Atlantic between them — tidal marsh, oyster basins, pine forest and dune, and a biota that belongs to none of the other two.
May, June, September, October
July and August fill Ré, Oléron and Arcachon solid, and the island bridges queue. The shoulder months are warm, empty and cheaper, and September brings the vendange, the cèpes and the first migration.
Fourteen days if that is all you have
Cut the Basque interior and the Médoc and run the coast straight through. You keep the Gois, the marsh, both islands, the dune and the Landes — and you still sail from Bilbao.
02 / JOURNEY LOG
Twenty-one days. St Malo in, Bilbao out.
South down the coast without turning round once — the Vendée, the Poitevin marsh, the two islands, the Gironde, Arcachon, the Landes and the Basque country — and across Biscay for home.
ST MALO → THE VENDÉE
Off the overnight boat and south past Nantes to the first of the tidal islands. The Atlantic coast starts where E02 left the Loire.
NIGHT BASE Noirmoutier / Barbâtre
THE PASSAGE DU GOIS
A four-kilometre road across the sea bed, open about ninety minutes either side of low water. There are rescue towers along it because people misjudge it every year.
NIGHT BASE Noirmoutier
→ THE MARAIS BRETON
Flat marsh, windmills and salt, with the Vendéen beaches on one side and Maraichine cattle on the other.
NIGHT BASE Saint-Jean-de-Monts
→ THE MARAIS POITEVIN
Green Venice — eight hundred kilometres of tree-lined canal under ash and poplar, and the light itself turns green.
NIGHT BASE Coulon / Arçais
GREEN VENICE
A day with almost no driving. Punt at first light for otters and night herons, then the Baudet du Poitou stud in the afternoon.
NIGHT BASE Coulon / Arçais
→ LA ROCHELLE
A walled harbour with two medieval towers guarding the chain across it. Park outside and walk or cycle in.
NIGHT BASE La Rochelle outskirts
→ ÎLE DE RÉ
Over the bridge to salt pans, whitewashed villages, a hundred kilometres of cycle path and donkeys in checked trousers.
NIGHT BASE Ars-en-Ré / Loix
RÉ: SALT AND BIRDS
The Fier d’Ars reserve at high tide, avocets and stilts on the pans, and fleur de sel raked off the surface on a still evening.
NIGHT BASE Ars-en-Ré / Loix
→ ROCHEFORT → ÎLE D’OLÉRON
The naval rope works at Rochefort, then the longest French island after Corsica — oyster claires, marshes and pine forest.
NIGHT BASE Saint-Trojan / Le Château
OLÉRON
Oyster cabins turned workshops, the salt marsh reserve at Môle, and Fort Boyard standing offshore between the two islands.
NIGHT BASE Saint-Trojan / Le Château
→ ROYAN → THE GIRONDE
The estuary mouth — the largest in western Europe — and the last European sturgeon population anywhere on this side of the continent.
NIGHT BASE Royan / Talmont
→ THE MÉDOC
Gravel banks the river laid down, planted since Roman times, and cellars that will show you round if you ask.
NIGHT BASE Pauillac / Margaux
→ BORDEAUX
Park on the edge and take the tram. The whole eighteenth-century river frontage is a UNESCO site and the city runs a low-emission zone.
NIGHT BASE Bordeaux outskirts
→ THE ARCACHON BASIN
A tidal lagoon full of oyster trestles, with the Île aux Oiseaux and its two stilted cabins in the middle.
NIGHT BASE La Teste / Arès
THE DUNE DU PILAT
Europe’s tallest dune at over a hundred metres, moving inland several metres a year and burying the forest behind it. Climb it at dawn or at dusk, not at noon.
NIGHT BASE La Teste-de-Buch
→ THE LANDES FOREST
Into a million hectares of maritime pine planted from 1857 to fix the dunes — the largest man-made forest in western Europe.
NIGHT BASE Mimizan / Léon
THE COURANT D’HUCHET
A short wild river running through near-subtropical forest to the sea, navigable only by punt with a licensed batelier. Book it.
NIGHT BASE Léon / Moliets
→ THE BASQUE COAST
South to where the Pyrenees meet the Atlantic. Flysch cliffs, big surf, and a completely different language on the signs.
NIGHT BASE Bidart / Saint-Jean-de-Luz
THE BASQUE INTERIOR
Pottok ponies on the hills, griffon vultures over La Rhune, and in October the palombe migration crossing overhead in millions.
NIGHT BASE Sare / Ainhoa
→ SAN SEBASTIÁN → BILBAO
Across into Spain along the Basque coast. Two hours before sailing, and the trip is done.
NIGHT BASE Bilbao outskirts
BILBAO → HOME
Across Biscay rather than back up the whole coast you have just driven. Fin whales over the canyon if the weather is kind.
NIGHT BASE — aboard —
The Passage du Gois is not a scenic detour, it is a tide-dependent road. Four kilometres across open sea bed, passable for roughly ninety minutes either side of low water, and under two metres of water the rest of the time. There are rescue towers along its length because people misjudge it every year. Read the published table, add margin, and remember the bridge exists.
03 / OPERATIONS BRIEFING
Tides, islands and a forest that closes.
It governs more than the Gois
- Atlantic ranges here are large. The Gois, the walk to Fort Louvois, the oyster beds and every pêche à pied depend on it.
- The Trip Engine gives spring and neap ranges months ahead but never times — for this coast you need an actual local table, and the SHOM data is the one to use.
- Waders push in on a rising tide, so the reserves are best in the two hours before high water, not at low.
One way on and one way off
- Ré has a toll bridge that costs markedly more in summer and queues in both directions.
- Oléron’s bridge is free and busier for it.
- Noirmoutier has both a bridge and the Gois, which is why people take the Gois.
- Both big islands are far better on a bicycle. Ré alone has over a hundred kilometres of dedicated path and the van is a liability on it.
The Landes is a planted forest
- A million hectares of maritime pine, planted from 1857, and it burns. The 2022 fires took thousands of hectares near Arcachon.
- Forest tracks and some campsites close on high-risk days, decided and published each morning in season.
- No barbecues, no cigarettes, and check the day’s risk map before any walk.
Marsh country in summer
- The Poitevin, the Marais Breton and the island marshes are exactly what you would expect at dusk in July.
- Screens, repellent, and a pitch with a breeze off the sea rather than one tucked in the reeds.
- Worst at dawn and dusk, which is also when the otters and herons are out. Dress for it rather than staying in.
Dense, and full in August
- This is the most heavily camped coast in France and the aire network is excellent — outside July and August.
- In season the coastal sites book months ahead and the aires fill by four in the afternoon.
- France Passion farms and vineyards inland are the answer, and often the better night.
Small things
- Emergency number is 112.
- Bordeaux and Bayonne run low-emission zones; this route avoids both, but Crit’Air is worth having anyway.
- The A10 and A63 run the length of the coast at Classe 2 for a van over 2 m. The parallel D-roads are free and better.
- Basque is a language, not a dialect, and place names appear in both forms south of Bayonne.
04 / THE ACCESS STACK
The French stack, plus two boats.
The far end first
- Bilbao return, booked early. There are few Biscay sailings and they sell out; this file does not work without it.
- St Malo outbound, with a cabin on the overnight.
- Courant d’Huchet punt — licensed bateliers only, and limited daily.
- Cordouan lighthouse boat, which runs by tide rather than by timetable.
Free, mostly
The Marais Poitevin is a regional park you drive through freely; the punts are the paid part. Banc d’Arguin is a national reserve with restricted landing. The Fier d’Ars and Môle reserves charge a small entry and are worth it for the hides alone.
ACSI and France Passion
Both earn their fee here more than on most files — ACSI because the shoulder season is exactly when you should come, and France Passion because the inland farms have space when the coast has none.
Who to join in France
- Centre des monuments nationaux ↗ — the French English Heritage
- Conservatoire du littoral ↗ — the coast, held permanently
- ONF ↗ — state forests, open on foot
- LPO ↗ — the French RSPB
Your British cards open nothing
National Trust covers Northern Ireland and nothing on the continent; English Heritage has no reciprocal arrangement anywhere here. Budget an access line for this file.
Most of these bodies protect land that is already free to walk on — joining funds the work rather than buying entry. The exceptions worth real money are the Dutch Museumkaart, the Irish OPW card, and DNT or STF if you will use the hut networks.
05 / THE EUROPE MATRIX
68 entries on this route, of 229 in the French book.
Tidal marsh, oyster basin, planted forest and dune — and two of the rarest animals in western Europe. The European sturgeon survives in the Gironde and nowhere else on this coast, and the European mink holds on in the Landes while the American one replaces it. The whole archive lives on the Europe Matrix page.
European sturgeon of the GirondeE1571
★ RARE
JFMAMJJASOND
The last population in western Europe, and one of the oldest fish lineages on earth. Protected absolutely since 1982, restocked from a hatchery, and a live one is a genuine event.
European minkE1572
★ RARE
JFMAMJJASOND
Among the most endangered mammals in Europe, and south-west France holds one of the last populations. Almost never seen; the American mink you do see is the reason it is going.
The Dune du PilatE1573
COMMON
JFMAMJJASOND
Europe’s tallest sand dune at over a hundred metres, moving inland several metres a year and burying the pine forest behind it as it goes.
Baudets du PoitouE1574
LIKELY
JFMAMJJASOND
An enormous shaggy donkey breed of the Poitou marshes, down to forty-four animals in 1977 and recovered by a deliberate rescue.
The ânes en culotte of RéE1575
LIKELY
JFMAMJJASOND
Island donkeys wearing checked trousers — originally to keep the marsh mosquitoes off their legs, and now kept up because the island decided to.
Oyster claires of Marennes-OléronE1576
COMMON
JFMAMJJASOND
Oysters finished in shallow clay ponds where a microscopic alga turns their gills green. The largest oyster region in Europe, and the green is not a fault.
The Passage du GoisE1577
COMMON
JFMAMJJASOND
A four-kilometre road across the sea to Noirmoutier, open for about ninety minutes either side of low water and under two metres of water the rest of the time.
Cockles and razor clamsE1578
COMMON
JFMAMJJASOND
Pêche à pied on the vast Vendéen flats at low spring tide, with size limits and closed seasons that are checked.
Little terns on the shingleE1579
LUCKY
JFMAMJJASOND
Nesting on bare beach above the tideline, and fenced against feet and dogs at every site that still holds them.
Kentish ploverE1580
LUCKY
JFMAMJJASOND
A tiny beach-nesting wader squeezed by tourism the whole length of this coast.
Oystercatchers and curlewE1581
COMMON
JFMAMJJASOND
On every flat and mudbank, and in winter the curlew flocks are in thousands.
Whimbrel on passageE1582
LIKELY
JFMAMJJASOND
Seven-note whistle over the marsh in spring and autumn, and easy to tell from the curlew once you have heard it.
Sanderling on the beachE1583
COMMON
JFMAMJJASOND
Running the wave edge like clockwork toys on every Atlantic beach in winter.
Green VeniceE1584
COMMON
JFMAMJJASOND
Eight hundred kilometres of tree-lined canals under ash and poplar, punted flat-bottomed, and green enough that the light itself changes colour.
European eels of the marshE1585
★ RARE
JFMAMJJASOND
A fish that breeds in the Sargasso Sea and has collapsed by more than ninety per cent. The marsh fishery is now tightly restricted.
Otters in the canalsE1586
LUCKY
JFMAMJJASOND
Recovered through the Poitevin and the Landes, and best looked for from a punt at first light.
Coypu on the banksE1587
COMMON
JFMAMJJASOND
South American, escaped from fur farms, and everywhere on this coast. Orange teeth and no attempt at concealment.
Black-crowned night heronE1588
LUCKY
JFMAMJJASOND
Stocky and grey, roosting in the canal willows by day and hunting at dusk.
Purple herons in the reedE1589
LUCKY
JFMAMJJASOND
Slimmer and shyer than a grey heron, slipping into cover rather than flying off.
Cattle egrets with the herdsE1590
COMMON
JFMAMJJASOND
Following the marsh cattle for whatever they turn up, and golden-crowned in spring.
Bluethroat in the marsh scrubE1591
LUCKY
JFMAMJJASOND
A robin shape with an enamel-blue throat, singing from a bush edge on the salt marsh.
Marsh harriers over the reedE1592
LIKELY
JFMAMJJASOND
Low, slow and V-winged over every reedbed on this coast.
European pond terrapinE1593
LUCKY
JFMAMJJASOND
The cistude, basking on a canal log, and genuinely native rather than an abandoned pet.
Maraichine cattleE1594
LIKELY
JFMAMJJASOND
The marsh breed, nearly lost to modern dairying and kept now as conservation grazers on the wet meadows.
Brent geese on the AiguillonE1595
LIKELY
JFMAMJJASOND
Wintering in tens of thousands on one bay, straight from the Russian Arctic.
Spoonbills on the flatsE1596
LIKELY
JFMAMJJASOND
Feeding with that side-to-side sweep, and now breeding on this coast after a long absence.
Avocets on the salt pansE1597
LIKELY
JFMAMJJASOND
Sweeping the brine on the worked pans of Ré, Oléron and the Guérande system.
Black-winged stiltsE1598
LIKELY
JFMAMJJASOND
Absurd pink legs on the shallow pans, and a bird Britain almost never gets.
Shelduck on the mudflatsE1599
COMMON
JFMAMJJASOND
Bottle-green and chestnut on every estuary, and moulting here in flocks in late summer.
Fleur de selE1600
COMMON
JFMAMJJASOND
Hand-raked from the surface of the pans on still evenings by saunier who work the same squares their grandparents did.
Salt-pan floraE1601
COMMON
JFMAMJJASOND
Sea lavender, glasswort and sea aster across the sansouire, purple in late summer.
Fort Boyard and the sea fortsE1602
COMMON
JFMAMJJASOND
A stone fort built in open water between two islands over thirty years, and abandoned as obsolete almost as soon as it was finished.
Allis shad and lampreyE1603
LUCKY
JFMAMJJASOND
Both run the Gironde to spawn each spring, and both are older lineages than almost anything else swimming.
Ospreys on the estuaryE1604
LUCKY
JFMAMJJASOND
On passage down the Atlantic flyway, and increasingly nesting in the Landes pines.
Cordouan lighthouseE1605
COMMON
JFMAMJJASOND
A Renaissance lighthouse standing alone in the estuary mouth since 1611, with a chapel inside it, reachable only at low water by boat.
Médoc vendangeE1606
COMMON
JFMAMJJASOND
Gravel banks laid down by the river, planted since Roman times, and picked from mid-September.
Vineyard peach and figE1607
COMMON
JFMAMJJASOND
Planted at the row ends as an early warning for mildew, and the fruit is a bonus nobody minds.
Banc d’Arguin ternsE1608
LIKELY
JFMAMJJASOND
A shifting sandbank in the basin mouth, a national reserve, and the most important tern colony on the French Atlantic.
Arcachon oyster bedsE1609
COMMON
JFMAMJJASOND
Trestles across the whole basin, uncovering at low water, and worked by flat-bottomed pinasse.
Île aux OiseauxE1610
COMMON
JFMAMJJASOND
A low island with two stilted cabins on it, surrounded at high water, and a roost for the whole basin.
Maritime pine of the LandesE1611
COMMON
JFMAMJJASOND
A million hectares planted from 1857 to drain and fix the dunes — the largest man-made forest in western Europe, and it changed the region completely.
Cèpes of the LandesE1612
LIKELY
JFMAMJJASOND
A serious autumn flush under the pines, taken seriously, and the roadside stalls follow within a day.
Courant d’HuchetE1613
COMMON
JFMAMJJASOND
A short wild river running through subtropical forest to the sea, navigable only by punt with a licensed batelier.
Common genet in the pinesE1614
LUCKY
JFMAMJJASOND
Spotted and ring-tailed, introduced centuries ago and thoroughly established in the Landes woodland.
Wild boar in the forestE1615
LIKELY
JFMAMJJASOND
Abundant under the pines, nocturnal, and the reason every clearing is fenced.
Southern damselflyE1616
★ RARE
JFMAMJJASOND
A declining European species with a stronghold on the small clear streams of Aquitaine.
Sea holly and marramE1617
COMMON
JFMAMJJASOND
Steel-blue and architectural on the dune front, holding a hundred kilometres of sand together.
Immortelle des sablesE1618
COMMON
JFMAMJJASOND
Yellow everlasting flowers that smell of curry in the heat, on the grey dune behind the front.
Pottok poniesE1619
LIKELY
JFMAMJJASOND
A small semi-wild Basque breed on the hills behind the coast, and depicted on cave walls in the same country.
Griffon vultures of La RhuneE1620
LIKELY
JFMAMJJASOND
Riding the ridge above the coast, and crossing the border a dozen times a day without noticing it.
Egyptian vultureE1621
LUCKY
JFMAMJJASOND
A summer visitor to the Basque foothills, small, scruffy and yellow-faced.
Raptor migration at OrganbidexkaE1622
LIKELY
JFMAMJJASOND
A Pyrenean pass where honey buzzards, black kites and cranes funnel through in tens of thousands each autumn.
The palombe migrationE1623
COMMON
JFMAMJJASOND
Woodpigeons crossing the western Pyrenees in millions, watched, counted and — in the Basque country — hunted with nets from towers, which is a live argument.
Cranes over the LandesE1624
LIKELY
JFMAMJJASOND
Bugling at altitude on the western flyway between Scandinavia and Spain, twice a year.
Manech and Basque sheepE1625
COMMON
JFMAMJJASOND
Red- and black-faced ewes on the foothills, and the milk that becomes Ossau-Iraty.
Kintoa pigsE1626
LIKELY
JFMAMJJASOND
The Basque pig, nearly extinct in the eighties, now out in the oak and chestnut woods again and protected by name.
Common and bottlenose dolphinsE1627
LIKELY
JFMAMJJASOND
Along the whole coast and regularly from the Biscay ferry, which crosses a canyon four thousand metres deep.
Harbour porpoiseE1628
LIKELY
JFMAMJJASOND
Small dark fins close inshore, and recovering in the Bay of Biscay.
Fin whales offshoreE1629
LUCKY
JFMAMJJASOND
The second largest animal on earth, over the canyon edge, and seen from the deck rather than from land.
Basking sharksE1630
LUCKY
JFMAMJJASOND
Working the plankton lines off the shelf edge in early summer.
Ocean sunfishE1631
LUCKY
JFMAMJJASOND
A vast lopsided disc basking flat at the surface, and completely harmless.
Bluefin tunaE1632
LUCKY
JFMAMJJASOND
Recovered dramatically in the Bay of Biscay after quota reform, and hunted here as they are in the Strait.
Grey seals on the outer rocksE1633
LUCKY
JFMAMJJASOND
Scarce this far south, but increasing, and hauled out on the Breton and Vendéen skerries.
Atlantic winter swellE1634
COMMON
JFMAMJJASOND
The Landes and Basque beaches take the full ocean, and Belharra off Saint-Jean-de-Luz produces genuine big-wave surfing.
Rockpools on the Basque shoreE1635
COMMON
JFMAMJJASOND
The flysch platforms south of Biarritz uncover into a rock pavement full of life, and the geology is a textbook in itself.
Flysch cliffsE1636
COMMON
JFMAMJJASOND
Layered rock tilted almost vertical, each band a few thousand years — including the boundary layer from the asteroid that ended the dinosaurs.
Dark skies over the LandesE1637
LIKELY
JFMAMJJASOND
A million hectares of forest with almost nobody in it, and the Milky Way stands up properly.
Perseids from the duneE1638
LIKELY
JFMAMJJASOND
August, a hundred-metre dune, the Atlantic on one side and forest on the other.
The field law. The sturgeon is protected absolutely — an accidental capture must be released and reported, and it is the only European fish with that status. Beach-nesting terns and Kentish plovers are fenced because a footprint ends a clutch. Pêche à pied has legal size limits and closed seasons that are checked at the slipway. And the tide table is not advisory on this coast.
06 / EXPEDITION TOOLKIT
The gentlest mileage, and a bike rack that earns its keep.
The single best thing you can carry
Ré, Oléron, the Poitevin, the Arcachon basin and the whole Vélodyssée coastal route are flat, signed and better on two wheels. This is the file where the bike rack pays for itself several times over.
Two ferries, one long
The Bilbao crossing is the largest single line. Run the budget core against the alternative — driving back up the coast with two extra days of fuel, tolls and pitches — before assuming it is expensive.
Easy, for once
Aires are dense the whole way down and service points are frequent. The off-grid core matters less here than on any file except the Low Countries.
Twenty-one of ninety
Check it in the Europe Engine against anything else planned for the same half-year.
07 / DEPARTURE CHECK
Atlantic additions.
The far boat
- Bilbao to Portsmouth, booked with a cabin. The file has no plan B without it.
- St Malo outbound.
- Coastal campsites if travelling in July or August.
Posted and arranged
- Crit’Air ordered; télépéage badge if you intend to use the A10.
- Courant d’Huchet punt and the Cordouan boat.
- Insurance and breakdown confirmed for France and Spain.
What earns its space
- Bicycles. Not optional on this file.
- Binoculars for the reserves and the dune.
- Screens and repellent for the marsh nights.
- Something to carry oysters home in, which you will need.
Daily habits
- Tide table before the Gois, every time.
- Check the fire-risk map before any Landes walk in summer.
- Reserves two hours before high water, not at low.
- Book the aire by four in the afternoon in season, or go inland.
08 / OPEN MAP
Eight hundred kilometres, one direction.
09 / WHERE NEXT
Three files that pair with this one.
Normandy, Brittany and the Loire · E02
This file starts where that one stops. Run them consecutively and you have six weeks of French coast from the Channel to the Pyrenees, with one crossing at each end.
Iberia North · E08
Your exit port is its entry port. Sail into Bilbao instead of out of it and the two chain seamlessly into seven weeks down the Atlantic.
Provence and the Camargue · E05
The Mediterranean third — heat, cicadas and flamingos. Between the three files, France is covered as thoroughly as any country in this archive.
FOUND THIS USEFUL?
Buy the crew a coffee, if you’d be so kind.
Everything here is free and always will be — the expedition files, the Nature Matrix, the seven calculators and the Trip Engine. Nothing sits behind a paywall, and nothing unlocks if you pay.
But if a file saved you a wasted weekend, or the Matrix put a puffin in front of your children, you are very welcome to stand us a coffee. It goes on diesel, ferries and the next expedition — which comes back up here, free, for you.
Fuel for the Nebuchadnezzar£10 · ONE PAYMENT →Entirely optional. One payment, never a subscription — and you can set any number up to ten at the checkout if you are feeling especially kind. No perks, no supporter tier, and absolutely no hard feelings either way.