Best natural monuments around Hillion feature the extensive Réserve Naturelle de la Baie de Saint-Brieuc, the largest natural reserve in Brittany. This area is a vital migratory hub for approximately 40,000 birds annually, showcasing diverse ecosystems including sandy areas, mudflats, dunes, cliffs, and salt marshes. The region holds international geological significance and offers numerous opportunities to explore its rich biodiversity and coastal landscapes.
Last updated: May 6, 2026
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Difficulty finding the start of the hike, so we chose the bay house.
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Continuation of the hike, very beautiful route
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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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The site is exceptional because it is located in the Nature Reserve which is home to a very varied fauna and flora. It can accommodate up to 40,000 migratory birds in winter. The site is also remarkable because it is located in the heart of the bay of Saint-Brieuc, the fifth bay in the world for the amplitude of its tides. The sea can recede more than 7 km! It is this natural heritage that the Maison de la Baie, classified as Maison Nature, lets you discover through its museum, its temporary exhibitions, its educational activities, its walks and its nature outings. Actions that show the richness of biodiversity, raise awareness of environmental protection and develop eco-citizen behavior. https://www.saintbrieuc-armor-agglo.bzh/sortir-et-decouvert/proteger-notre-environnement/preservation-de-la-baie/la-maison-de-la-baie
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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 fountain, sheltered by a beautiful 15th-century portico, borders the choir closure of the Chapelle N.D.-de-la-Fontaine. Saint Brieuc, a Welsh monk, is said to have settled on this site in the 5th century when he came to preach in the area.
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In the 'House of the Bay', information about the local natural heritage is provided in a playful, interactive manner. Numerous nature excursions familiarize participants with various topics, from mussel farming to the many secrets of the sludge. Here you also have a beautiful viewpoint.
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The Réserve Naturelle de la Baie de Saint-Brieuc, which encompasses Hillion's coastline, offers diverse ecosystems including sandy areas, mudflats, dunes, cliffs, and salt marshes. You can explore the intertidal zone, which is rich in invertebrates, and the dune system, home to over 350 plant species. Notable points include the Pointe d'Illemont and the Pointe du Grouin, offering expansive views. The mouth of the Gouessant river also forms a wooded ecological corridor.
The Bay of Saint-Brieuc Natural Reserve is a vital migratory hub, hosting approximately 40,000 birds annually. You can observe various species, including waders from October to March and waterfowl like geese, ducks, and swans from February to November. Beyond birds, the reserve is home to remarkable species such as the European otter, harbor seal, Natterjack toad, agile frog, and green frog.
For birdwatching, the reserve is particularly active during migratory periods. Waders are abundant from October to March, while waterfowl can be seen from February to November. The diverse ecosystems offer something to see year-round, but these periods are ideal for observing the vast numbers of migratory birds.
Yes, the area around Hillion offers a variety of hiking trails. For example, the La Grève des Courses is part of the GR34, a coastal hiking trail. You can find routes ranging from moderate to difficult, such as the "Pointe des Guettes par le sentier des douaniers" loop. For more options, explore the Hiking around Hillion guide.
Absolutely! Many natural monuments in the area are suitable for families. The Saint-Brieuc Bay Visitor Centre is family-friendly, offering interactive exhibits. La Grève des Courses and the Pointe des Guettes Viewpoint are also noted as family-friendly, providing accessible ways to enjoy the natural beauty and views.
While many outdoor areas in France are dog-friendly, specific rules can vary within natural reserves. It's generally advisable to keep dogs on a leash to protect local wildlife, especially in sensitive areas like the Bay of Saint-Brieuc Natural Reserve. Always check local signage for specific regulations regarding pets.
Beyond hiking, the region offers excellent opportunities for cycling and mountain biking. You can find various routes, such as the "Discovering Hillion" loop for cycling or the "VTT Côtes d'Armor Hillion" for mountain biking. Explore the Cycling around Hillion guide and the MTB Trails around Hillion guide for detailed routes.
The Saint-Brieuc Bay Visitor Centre (Maison de la Baie) is an excellent resource. It offers a museum, temporary exhibitions, educational activities, and guided nature outings to help you discover the rich biodiversity and geological significance of the reserve.
Yes, several spots offer stunning panoramic views. The Pointe des Guettes Viewpoint provides beautiful vistas of Morieux Cove and the surrounding coasts, complete with an orientation table. The Pointe du Grouin also offers expansive views of the bay from the Hillionnais cliffs.
While primarily natural, some sites blend natural beauty with history. For instance, Our Lady of the Fountain is a religious site with a natural spring, where Saint Brieuc is said to have settled in the 5th century. The area around La Grève des Courses also has historical ties, having been a former Napoleonic horse competition track.
Parking is generally available at key access points and visitor centers for the natural monuments, such as near the Saint-Brieuc Bay Visitor Centre and popular viewpoints like the Pointe des Guettes. Specific parking details may vary by location, so it's always good to check local information upon arrival.


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