4.6
(1424)
9,025
hikers
24
hikes
Hiking trails around Réserve naturelle nationale de la baie de Saint-Brieuc traverse a diverse landscape characterized by an expansive bay with one of the world's highest tidal ranges, creating dynamic mudflats and salt marshes. The reserve encompasses windswept dunes, dramatic coastal cliffs, and sandy areas, extending inland to river valleys. This region, the second-largest nature reserve in Brittany, offers varied terrain for outdoor activities.
Last updated: April 22, 2026
4.3
(4)
70
hikers
6.52km
01:44
70m
70m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.3
(9)
83
hikers
8.45km
02:16
100m
100m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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4.8
(10)
20
hikers
11.2km
03:05
180m
180m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.7
(24)
93
hikers
3.93km
01:02
30m
40m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.0
(1)
56
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Popular around Réserve naturelle nationale de la baie de Saint-Brieuc
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From 1905 to 1948, the train made a stop there between Saint-Brieuc and Moncontour. The inhabitants of the Grèves used it frequently to get around and transport goods, particularly bricks produced by the nearby factory. It was called the "Petit train des Côtes-du-Nord", the former name of the department, because there was only 1 m spacing between its rails compared to 1.435 m on a normal track.
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Classified as a Nature Reserve since 1998, all this wild nature almost disappeared during the 20th century. A landfill was located a little higher up, and plans for a port or even an airport were circulating. After twenty long years of fighting, led in particular by naturalists and local residents, the bottom of the Baie de Saint-Brieuc has regained its original calm and serenity. This landscape of water channels surrounding salt meadows, completely covered during the high tides, welcomes a diversity of birds from all horizons every year.
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Majestic arched viaduct, it is part of the many works of art in the Bay of Saint-Brieuc built by engineer Harel de la Noë at the beginning of the 20th century. 10 m high and 58 m long, it spans a small stream, which once allowed the Chemins de fer des Côtes-du-Nord line to connect Saint-Brieuc to Moncontour.
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worth dwelling on
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Historical monument rated per 2018. Originally a rail connecton from 1905 till 1949.
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The Réserve naturelle nationale de la baie de Saint-Brieuc offers a diverse network of over 20 hiking routes. These trails cater to various preferences, ranging from easy strolls to more moderate coastal walks, allowing you to explore the bay's unique landscapes.
Yes, the reserve features 13 easy hiking trails perfect for families or beginners. An example is the Pont-Neufs Viaduct – Ponts-Neufs Viaduct loop from Morieux, a 2.4-mile (3.9 km) route that takes about an hour to complete, offering gentle terrain and scenic views. The region research also mentions "Entre grèves et prés" as an easy 7 km walk accessible with all-terrain strollers.
The Réserve naturelle nationale de la baie de Saint-Brieuc is a crucial habitat for diverse wildlife. It's particularly renowned as a birdwatching hotspot, with over 200 bird species, including migratory birds like Siberian geese and brent geese. Beyond birds, you might spot European otters, harbor seals, and various amphibians like the natterjack toad. Bird observatories, such as the one on Pointe d'Illemont, provide excellent opportunities for discreet observation.
Yes, many of the trails in the Réserve naturelle nationale de la baie de Saint-Brieuc are circular, offering convenient starting and ending points. For instance, the Douvenant Viaduct – Greves de langueux loop from Langueux is an easy 4.0-mile (6.5 km) circular path that provides views of the viaduct and coastal areas. Another option is the "Panoramas sur la Réserve Naturelle," an 8.9 km easy loop around the Hillion peninsula.
The reserve is rich in stunning natural features. You can experience the expansive bay with its dramatic tidal range, creating constantly changing mudflats and salt marshes. The La Grève des Courses offers beautiful coastal scenery. Don't miss the Dunes de Bon Abri, a unique area with dunes, grasslands, and woodlands. The Pointe du Grouin Viewpoint is also a great spot for panoramic vistas.
The Réserve naturelle nationale de la baie de Saint-Brieuc offers unique experiences throughout the year. Spring and autumn are ideal for birdwatching, as migratory species pass through. Summer provides pleasant weather for coastal walks and enjoying the beaches. Even in winter, the dynamic tidal landscapes and resident bird populations offer a captivating experience, though some paths might be muddy.
Yes, the Boutdeville Park is a nearby historical site. Additionally, the Maison de la Baie (House of the Bay) in Hillion serves as an ecomuseum and interpretation center. It provides valuable insights into the reserve's natural resources and conservation efforts, enriching your understanding of the local ecosystem before or after your hike.
The trails in the Réserve naturelle nationale de la baie de Saint-Brieuc are highly rated by the komoot community, with an average score of 4.6 stars from over 230 reviews. Hikers frequently praise the diverse landscapes, from dynamic mudflats to coastal cliffs, and the rich biodiversity, especially the abundant birdlife. The well-maintained paths and stunning views of the Breton coast are also often highlighted.
While there are no 'difficult' rated trails, the reserve offers 11 moderate routes for those seeking a longer outing. The Cotentin Beach – Saint-Maurice Chapel loop from Morieux is a moderate 6.9-mile (11.2 km) hike, taking around 3 hours, with an elevation gain of about 179 meters. A significant portion of the GR®34 Coastal Path also traverses the reserve, offering extensive walking opportunities.
Given the varied coastal and inland scenery, it's advisable to bring appropriate footwear for different terrains, including potentially muddy sections. Layers of clothing are recommended due to changing weather conditions, especially near the coast. Binoculars are highly recommended for birdwatching, and don't forget water, snacks, and sun protection. Checking tide times is also crucial for coastal walks.
While specific public transport links directly to all trailheads are not extensively detailed, the region is generally accessible. For detailed information on reaching specific starting points by bus or train, it's best to consult local public transport schedules for the Saint-Brieuc area and surrounding communes like Hillion or Langueux.
The Réserve naturelle nationale de la baie de Saint-Brieuc is a protected natural area. While many trails in France allow dogs on a leash, specific regulations can vary within nature reserves to protect wildlife, especially ground-nesting birds and sensitive habitats. It's always best to check local signage at trailheads or the official website of the reserve for the most current rules regarding dogs.


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