Best attractions and places to see around Réserve naturelle nationale de la baie de Saint-Brieuc, a significant natural site in Brittany, France, known for its rich biodiversity and large tidal range. This reserve serves as an international wetland for migratory birds, hosting over 40,000 birds, particularly during winter. It features diverse habitats including mudflats, salt marshes, dunes, and estuaries, offering varied landscapes for exploration. The area is also home to the GR34 Coastal Path, providing access to many of its natural features and viewpoints.
Last updated: April 25, 2026
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Popular around Réserve naturelle nationale de la baie de Saint-Brieuc
The Customs Officers' Path – GR 34 between Paimpol and Erquy
Cycling around Réserve naturelle nationale de la baie de Saint-Brieuc
Hiking around Réserve naturelle nationale de la baie de Saint-Brieuc
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Gravel biking around Réserve naturelle nationale de la baie de Saint-Brieuc
Road Cycling Routes around Réserve naturelle nationale de la baie de Saint-Brieuc
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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Stop in front of the orientation table and enjoy this exceptional landscape. At low tide, the mussel farms are clearly visible. Hillion Bay has been home to several mussel farming concessions since the 1960s. Here, we are talking about bouchot mussels, on wooden stakes planted in the sand. The bay and its powerful tidal ranges (the sea retreats up to 7km) are suitable for the growth of mussels, ready to be enjoyed from June to October. They have been Label Rouge certified since 2017. Direct sales in the Bon Abri mussel farming area. Photo credit: Emmanuel Berthier
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Today, La Grève des Courses is part of the GR34, a coastal hiking trail that allows you to discover all of Brittany’s coasts. From here, you can enjoy magnificent views of the Anse d’Yffiniac. The area is also home to mussel farms, known as “bouchots”, which are a local specialty. The Réserve Naturelle de La Baie de Saint-Brieuc itself is the largest nature reserve in Brittany.
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In the 19th and 20th centuries, La Grève des Courses was a festive place where horse races and aviation meetings took place. However, it later became a wild dump where waste was thrown directly onto the sand, polluting the bay. Thanks to the efforts of environmental associations, it was transformed into a nature reserve.
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Volunteers work to perpetuate the memory of the “Little Train” present from 1905 to 1956 in the Côtes-du-Nord department. Free access site, two exhibitions in passenger cars, one of which is permanent on the history of this little train. For a more fun moment, board one of the “Boutdeville Tramways” which crisscross the magnificent park.
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Wild and secret, the Yffiniac cove is the most advanced part of the land of the Bay of Saint-Brieuc. Located in the heart of the largest Nature Reserve in Brittany, it can be discovered along the Chemin des Grêves.
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The fifth bay in the world for the amplitude of its tides is located on the Channel-Atlantic migration axis. Between 30,000 and 40,000 birds make a migratory stopover here or reside there for the winter: Siberian geese, spotted locusts, Balearic shearwaters, skylarks, melodious linnets, brent geese... These guests know that in this landscape of more than a thousand hectares, apparently desert, intense animal life animates the waters and sand. A real pantry! The bottom of the bay is also home to remarkable geology, dunes, salt meadows...
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In the former Langueux brickworks, a picture is sketched of the economic activities in the bay during the 19th century. A platform (recreated in full size) and a miniature railway are reminders of the local railway company of Cotes-d'Armor. Exhibition on the history of the brickworks and the restored ring kiln (1870).
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The reserve is rich in diverse natural features. You can explore the vast intertidal zone known as the Estran, the extensive salt marshes, and the unique dune system of the Dunes de Bon Abri. Key areas like the Anse d'Yffiniac and Anse de Morieux are central to the bay's ecosystem. Don't miss the panoramic views from Pointe du Grouin Viewpoint, which overlooks the entire Nature Reserve.
The Réserve naturelle nationale de la baie de Saint-Brieuc is an international wetland of interest for migratory birds, hosting between 30,000 and 40,000 birds, especially during winter. You can observe species like Brent geese, common shelducks, swans, herons, and various waders. Beyond birds, the reserve is home to remarkable species such as the European otter, harbor seal, Natterjack toad, agile frog, and green frog. The seabed of Saint-Brieuc Bay provides a critical food source for these animals.
Yes, the famous GR34 Coastal Path (Sentier des Douaniers) runs along the coastline of the reserve, offering magnificent views and access to various sections. For more specific routes, you can find numerous options in the area, including easy hikes like the "Douvenant Viaduct – Greves de langueux loop from Langueux" or moderate trails such as the "Saint-Maurice Chapel – Jospinet loop from Morieux." You can explore more hiking options on the Hiking around Réserve naturelle nationale de la baie de Saint-Brieuc guide.
Families can enjoy several easy walking trails around the reserve. Options include the "Boutdeville Park loop from Yffiniac" (3 km) or the "Boutdeville - La Briqueterie – Viaduc du Vau Hervé loop from Hillion" (4 km). These trails often pass by interesting points like Boutdeville Park, which has a miniature railway. For more family-friendly routes, check the Easy hikes around Réserve naturelle nationale de la baie de Saint-Brieuc guide.
The reserve is particularly vibrant during migratory seasons, especially in winter when over 40,000 birds make it their home or a stopover. Spring and autumn also offer excellent bird-watching opportunities. The vast intertidal zone, or Estran, provides a spectacular and ever-changing landscape year-round, best experienced at low tide.
While primarily a natural conservation area, the reserve does feature a few points of interest. The Pointe du Grouin Viewpoint is built on the platform of a former German blockhouse from WWII, offering a glimpse into its historical past. Additionally, the Maison de la Baie in Hillion serves as an educational center, providing insights into the bay's natural resources and biodiversity.
The Maison de la Baie in Hillion is the primary educational center for the nature reserve. It offers insights into the bay's natural resources and biodiversity, providing information and organizing guided tours and themed outings throughout the year to help visitors understand and appreciate the fragile natural heritage.
Visitors particularly appreciate the stunning panoramic views, especially from spots like Pointe du Grouin Viewpoint. The wild and secluded nature of areas like La Grève des Courses, Saint-Brieuc Bay Nature Reserve, and the opportunity for bird watching are also highly valued. The unique landscape of the seabed of Saint-Brieuc Bay, with its immense tidal range, is a significant draw.
Yes, the area offers opportunities for cycling and gravel biking. You can find routes like the "Ponts-Neufs Viaduct – VTT Côtes d'Armor Hillion loop from Hillion" (35.6 km, moderate difficulty) or the "Greves de langueux – Grèves Coastal Cycle Path loop from Pont des Courses" (25.7 km, moderate difficulty). For more options, refer to the Gravel biking around Réserve naturelle nationale de la baie de Saint-Brieuc guide.
Yes, the reserve is an excellent location for bird watching. The Observatoire ornithologique at Pointe d'Illemont provides an ingenious observation post. Other prime locations include Pointe du Grouin and Pointe des Guettes in Hillion. The Grève de Saint-Guimond and the site of La Cage (Langueux) are specifically mentioned for hosting ducks, Brent geese, and waders, especially during migratory seasons.
The bay is home to several mussel farming concessions, particularly in the Hillion Bay area, which have been active since the 1960s. These farms cultivate 'bouchot mussels' on wooden stakes planted in the sand. The bay's powerful tidal ranges, which can see the sea retreat up to 7 km, create ideal conditions for mussel growth. These mussels have been Label Rouge certified since 2017 and are typically ready for harvest from June to October. You can observe them at low tide from viewpoints like Vue sur les bouchots.


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