GR34: Map, Sections, and Logistics for Brittany’s Coastal Trail

The GR34 at a glance: more than 1,240 miles of coast

A trail as wide as a pair of shoulders, heath covered in gorse and heather, the sea a few dozen yards below, and a white-and-red blaze painted on a rock: that’s the GR34 for hundreds of miles. Between headlands, it also crosses dunes, beaches, harbors, and the muddy upper reaches of estuaries.

GR stands for grande randonnée, the French name for the long-distance trails approved by the French Hiking Federation (FFRandonnée), and the GR34 is the one that follows the coast of Brittany. It starts at the bay of Mont-Saint-Michel, in the Manche département, and ends in Saint-Nazaire, in Loire-Atlantique, after following the entire Brittany coastline [1]. The federation, which approved the route, describes it as “more than 2,000 kilometers” long; its Brittany committee counts on 100 days of hiking at 12 miles (20 km) a day [2]. The trail crosses six départements, France’s rough equivalent of counties: Manche, Ille-et-Vilaine, Côtes-d’Armor, Finistère, Morbihan, and Loire-Atlantique, in three regions [3].

Why “more than 2,000” and not an exact figure? Because the route keeps moving: a cliff collapses, a detour goes in, an estuary gets bypassed a different way, and each organization measures a different route on a different date. A visitor survey presented to coastal site managers in 2019 came up with 1,260 miles (2,028 km) [3], right after the last section was added: 90 miles (145 km) from the Vilaine River to the Saint-Nazaire bridge, opened on September 15, 2018 [4].

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Like every GR, it’s marked with white-and-red blazes; the GR de Pays, regional trails that connect to it around Cap Sizun or the Crozon Peninsula, use yellow and red [7]. What each blaze means is explained in our guide to trail markers and blazes.

Where the customs officers’ path comes from

The date the FFRandonnée goes with is 1791: during the French Revolution, the country’s new customs administration had the coast patrolled on foot to stop smuggling [8]. Customs officers also kept an eye on shipwrecks that washed ashore, which the state considered its property [9]. Foot patrols actually go back further: before the Revolution, the brigades of the Ferme générale, the private company that collected customs duties and other taxes for the king, were already paying lookouts to walk what would become the customs officers’ path [10].

The path fell out of use in the early 20th century [8]. In 1968, volunteers from the Comité national des sentiers de grande randonnée, the forerunner of the FFRandonnée, painted the first white-and-red blazes on the Brittany coast, between Beg-Léguer and Pors Mabo, near Lannion [8]. The work was led by Émile Orain, then regional president of France’s youth hostel association, and the tools were a shovel, a billhook, and a sickle [9].

The big turning point came with a law passed on December 31, 1976, which created a right of way for pedestrians along the coast and gave the trail its legal footing [9]. Sections were added one at a time after that. Since 2017, the GR34 has started at Mont-Saint-Michel [9], and for its 50th anniversary, in 2018, it gained its last section, to Saint-Nazaire [4].

The trail has also become a bit of a celebrity. In a vote held by the FFRandonnée in November 2017, its Bay of Morlaix section, from Locquirec to Saint-Pol-de-Léon, won it the title of France’s favorite GR for 2018, with nearly 24% of the vote [12]. A regional study shared by the federation in 2019 estimated that more than 9 million people use it every year, two-thirds of them out for a short walk [13].

Which section to choose: seven classics, by the numbers

Nobody has to start at Mont-Saint-Michel. The FFRandonnée’s topo-guides, its official trail guidebooks, split the GR34 into big chunks of 176 to 331 miles (284 to 533 km) [14], and local tourism offices suggest hikes of a few days, with stages and elevation gain. Here are seven of the best documented, from northeast to south.

The Côte d’Émeraude. Between Cancale and Saint-Malo, the Pointe du Grouin and a string of coves line up over 21 miles (34 km), in two stages [15]. The FFRandonnée reports nearly 3,300 feet (1,000 m) of total elevation gain on the first one alone, from Cancale to La Guimorais [16]. So much for a stroll along the beach. In Saint-Malo, you cross the Rance River on foot over the dam, or take the water shuttle to Dinard.

Cap Fréhel and Cap d’Erquy. Together, they’ve been a Grand Site de France since 2019, a national label for famous, heavily visited protected landscapes [22]. The hike suggested by the Côtes-d’Armor tourism office links them in four stages of 8 to 12 miles (13 to 19 km), with 5,400 feet (1,650 m) of elevation gain, from Saint-Cast-le-Guildo to Pléneuf-Val-André [17].

The Goëlo coast. From Saint-Brieuc to Paimpol, it’s the toughest of the three Côtes-d’Armor hikes listed here: 7,900 feet (2,400 m) of elevation gain over 43 miles (70 km), including 1,790 feet (545 m) on the 7.5 miles (12 km) between Plouha and Lanloup [18]. The trail dives down to every cove and climbs straight back up the cliff.

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The Côte de Granit Rose. It’s easier going: 3,200 feet (975 m) of elevation gain over 37 miles (60 km) from Lannion to Perros-Guirec, and only 330 feet (100 m) of it between Pleumeur-Bodou and Trégastel [19]. At Ploumanac’h, at the Gouffre de Plougrescant, and on Île Renote, in Trégastel, hiking poles must have rubber tips, to protect fragile trails [5].

The Crozon Peninsula. The loop is about 80 miles (130 km), and in 2016 the FFRandonnée summed it up in one line: it “never stops climbing and dropping, from the clifftops down to the bottom of the coves” [20]. The four days it mentioned mean well over 18 miles (30 km) a day; at 12 miles (20 km) a day, I’d plan on six or seven days instead.

Cap Sizun and the Pointe du Raz. The Pointe du Raz en Cap Sizun has been a Grand Site de France since 2004 [22]. The loop around the cape starts and ends in Douarnenez: 75 miles (120 km) in six days with the GR de Pays du Cap Sizun [14].

The Gulf of Morbihan. The full loop is 112 miles (180 km) in 16 stages of 5 to 12 miles (8 to 20 km), or “a good two weeks” [21]. Small ferries let you skip part of it (see below).

Planning your route: the five topo-guides

The FFRandonnée covers the GR34 in a series of five topo-guides, each with its stages and the GR de Pays trails that branch off it [1] [14]. The way they split it up gives you a good sense of how big this trail is.

A tip from a longtime reader of old manuals: bring the paper topo-guide even if you hike with an app. It won’t have the latest detours, sure, but its battery never dies, and its maps show you the rivers you’ll have to walk around well before you reach the bank.

How fit do you need to be? Terrain, pace, and footwear

The GR34 never climbs high, but it climbs a lot. The FFRandonnée’s Brittany committee warns that you can rack up 3,300 feet (1,000 m) of elevation gainThe total of all the climbs on a route, in feet or meters. in a day, because “the climbs can repeat over short distances” [2]. The stretch between Mont-Saint-Michel and the Pointe du Raz has most of the relief [23]; the south, with its dunes and its gulf, has less.

To estimate a stage, the federation counts on 2.5 mph (4 km/h) on flat ground and 1,000 to 1,150 feet (300 to 350 m) of climbing per hour, not counting breaks [24]. On the coast, the times published by tourism offices work out to about 2.5 mph: 9 miles (14.4 km) in 4 hours from Dinard to Saint-Malo [25], 18 miles (29 km) in 7½ hours from La Richardais to Lancieux [26]. The full method is in our guide to estimating hiking time.

For your backpack and footwear, two pieces of advice keep coming up on the federation’s and the Côtes-d’Armor pages: a backpack that weighs no more than 20% of your body weight [5], and real footwear, because “sandals and flip-flops have no place” on the GR34 [16]. The trail can cross roots, granite steps, and soft sand all in the same hour.

Tides, estuaries, and ferries: what cuts the trail

The sea redraws the GR34 twice a day. On the Côte d’Émeraude, several stretches run along the beach at low tide, with an alternate route through the streets at high tide: in Dinard, on the Prieuré and Saint-Énogat beaches, and in Saint-Servan, on Rosais beach [25] [26]. Elsewhere, the tide shuts the trail completely: in Trégunc, the causeway of the Minaouët tide mill is off-limits from an hour before to two hours after high tide when the coefficient, France’s scale for the size of a tide, is above 90 [27].

Official tide times and coefficients are published by SHOM, the French Navy’s hydrographic service [28]; our guide to tides and the French coefficient explains how to read them. A quick reminder that saves the evening: tide times shift from one day to the next, and they’re not the same in one bay as in the next one over.

The other trap is estuaries. Without a boat, the trail detours inland around every river, sometimes a long way: in Lorient, the boat bus saves you 3.7 miles (6 km) of walking between Locmiquélic and Port-Louis [29]. Ferries and small passenger boats shorten the route, but most only run from April to September.

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Where to stay: campgrounds, gîtes, and the camping question

Unlike some European mountain trails, the GR34 has no huts: you stay in hikers’ hostels, hotels, B&Bs, or campgrounds. Gîtes d’étape (simple hikers’ hostels), hotels, campgrounds, chambres d’hôtes (B&Bs), and youth hostels can be found within 1.2 miles (2 km) of the trail, and the Brittany committee recommends booking ahead [2]. Most campgrounds are open from April to September [2].

What about a tent? France’s planning code, the Code de l’urbanisme, bans camping outside campgrounds, unless an exemption is granted, on the seashore and in sites inscrits and sites classés, France’s two levels of protected landscape [39], and this coast has plenty of them. Mayors can also ban it with a local order posted at the town hall and at access points [39]: Pornichet’s beach order, for example, bans overnight camping (bivouac) by name [40]. According to the local tourism office, camping outside campgrounds is banned in every town in Lorient Bretagne Sud [41]. The Parc naturel régional d’Armorique, a regional nature park, notes that backcountry camping is banned on all sites inscrits or classés, and on the Iroise islands [42]; at Cap d’Erquy and Cap Fréhel, camping trailers and RVs are banned at night in the site classé [43].

A feature shared by the FFRandonnée sums it up: backcountry camping is “broadly prohibited all along the coast,” and you’re better off using the many campgrounds [44]. The rules in detail are in our guide to backcountry camping in France.

Getting there and back without a car

From the US, the most straightforward route is to fly into Paris, then take the TGV, France’s high-speed train, to Brittany. Trains serve both ends of most sections, and the stations closest to the trail are only a few hours from Paris.

Along the coast, Côtes-d’Armor has three regional (TER) train stations right on the route, Saint-Brieuc, Paimpol, and Lannion, and lots of buses on BreizhGo, Brittany’s regional network, run along the trail, some only in summer [5]. Morbihan has three TGV stations, in Vannes, Lorient, and Auray [46]. From Auray, the Tire-Bouchon train gets to Quiberon in about 43 minutes: in 2026, it ran on weekends in June and early September, and daily from June 29 to August 31 [48].

To get back to your starting point, the itineraries often list the right bus: BreizhGo line 201 connects Paimpol and Saint-Brieuc every day, year-round [18], and line 31 runs from Lamballe station to Saint-Cast-le-Guildo [17].

When to go: spring, summer, or September

The Brittany committee recommends “spring, summer, and early fall,” because some stretches get wet or muddy in fall and winter [2]. Tourisme Bretagne, the regional tourism board, sees ideal conditions from mid-April to late June, and quieter trails in September [23].

So it doesn’t rain the same everywhere: Brest gets over 60% more rain than Dinard. Off-season, also plan around closed campgrounds and boats, and around groceries: in the low season, Sundays and public holidays can bring surprises [5].

Safety: cliffs, closures, and emergency numbers

The GR34’s main danger is nothing exotic: it’s the cliff edge. In 2025, the FFRandonnée recalled a hiker’s fatal fall, from more than 49 feet (15 m) up, off the cliffs at Cancale [16]. The Côtes-d’Armor committee’s advice fits on one line: stay “strictly on the marked trails” and don’t cross into closed areas [53].

The trail retreats with the coastline. Rockfalls cut it, and towns then close sections by local order, with a marked detour. As of October 23, 2026, for example, the GR34 had been closed between the Cap Fréhel parking lot and Fort La Latte since the heath fire, and between Port Martin and Les Rosaires, in Plérin [53]; in Plougonvelin, a 2026 order closes it at Keryunan, above a cavity 13 to 16 feet (4 to 5 m) deep [54]. In Finistère, the Pointe de Rosmellec closes from November 15 to March 15 so birds can winter there undisturbed, with alternate routes to follow on the GR34 [27].

These alerts are published by the FFRandonnée’s département committees [53] [27]. Wind matters too: in gales, the Finistère prefecture, the national government’s local office, advises staying away from exposed coastal areas, as it did on October 23, 2026, during Storm Austen [55]. A tree across the trail or a faded blaze can be reported on Suricate, France’s system for flagging trail problems [56].

Fires, dogs, bikes: what the trail allows

• Fires: banned year-round on Morbihan’s beaches [59]; in Finistère, banned from April 1 to September 30 on heathland, in woods, and within about 650 feet (200 m) of them [60]. At Cap Fréhel, the Grand Site’s managers keep it simple: don’t light fires outdoors [43].
• Dogs: the rules change from town to town, and many beaches are off-limits to dogs in summer, like Pornichet’s from June 15 to September 15 [40]. At Cap d’Erquy and Cap Fréhel, the managers recommend hiking without your dog, and keeping it on a leash in any case [43]. Our tips for hiking with your dog.
• Bikes: the coastal right of way is for pedestrians only [11]; cyclists have their own routes.
• The heath: stay on the trail, because “shortcuts encourage erosion” [43], and erosion is exactly what makes the trail retreat.

Gallery: the GR34 in six landscapes

Six real photos of the trail and its landscapes, from northeast to south, published under free licenses on Wikimedia Commons by their photographers, who are credited under each image. Tap or click a photo to enlarge it.

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Worth watching

A hiker’s chaptered overview of the GR34 in English: which direction to hike, when to go, difficulty, road-walking sections, side trips, and the guidebooks to use.

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Guillaume Hoarau

Camping, backpacking, bushcraft and hiking

Guillaume Hoarau writes for Outfarer about camping, backpacking, bushcraft, and hiking. A survival-skills buff and a collector of vintage field manuals, he loves clear explanations, lists that actually help and other people’s stories, which he tells well.

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