Best natural monuments around Le Crotoy are primarily centered around the Baie de Somme, a significant wetland reserve. This region features vast sand and tidal flats, salt marshes, and dunes. It serves as a crucial stopover for migratory birds and supports diverse marine life, including seals. The area offers a variety of natural sites for exploration.
Last updated: October 7, 2026
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Gravel biking around Le Crotoy
The bay of summer, on our trip it was low tide.
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Hike with the difficulty of the dunes but very nice and beautiful.
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Gaston Caudron (actually Alphonse) (Favières, 18 January 1882 - 10 December 1915) and René Caudron (Favières, 1 July 1884 - 27 September 1959) were French aviation pioneers. They founded the world's first flying school and built the world's first seaplane. The Caudron brothers were farmers with a passion for aviation, which was then gaining popularity. In the spring of 1908, they built a glider with which they made their first flights on the fields of a farm (Ferme de Romiotte) a few kilometres from Le Crotoy. The aircraft was pulled by a horse. In this way, they realised six flights over a distance of between 800 and 1200 m. René piloted the glider. In 1909, they founded the company Aéroplanes Caudron Frères and from 1910 the Société des avions Caudron, initially established in Le Crotoy and later in Rue. They acquired a special place in the history of aviation. In 1910, they founded the first flying school in the world, attracting future pilots, and in August 1910, René obtained his pilot's license in Le Touquet. In March 1911, Gaston obtained his civil aviation license. In 1912, the brothers built the first seaplane in the world.
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The endless expanse of the beach is simply amazing.
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Le Port du Crotoy is a charming stop on your mountain bike ride, with its picturesque harbour full of colourful fishing boats and traditional sailing ships. As you walk along the harbour, you can enjoy the lively atmosphere and views of the Baie de Somme. It’s the perfect place to take a break, soak up the maritime charm and perhaps grab a bite to eat at one of the waterfront cafés.
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Fort Mahon Plage is a luxury seaside resort with a very extensive beach and is located in the middle of a protected dune area. You will find many restaurants, boutiques and also a casino here. Are you a nature lover? Then you will definitely get your money's worth here. More than 400 species of birds live in the Baie de Somme. There are also beautiful hiking areas in the area.
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The most significant natural monument is the Baie de Somme itself, a UNESCO-designated Grand Site de France known for its vast wetlands, sand and tidal flats, and rich biodiversity. Other notable sites include Authie Bay, famous for its seal colony and diverse landscapes, and the Fort-Mahon-Plage Beach, set within a protected dune area.
Yes, several natural monuments are ideal for families. Authie Bay and Fort-Mahon-Plage Beach are both listed as family-friendly, offering wide sandy areas for play and exploration. The Panoramic view of Marquenterre Park is also great for families interested in birdwatching, with easy access to observation points.
The Baie de Somme is a prime location for wildlife. You can often spot seals basking on sandbanks at low tide, particularly at Pointe du Hourdel within the bay. For birdwatching, the Parc du Marquenterre (accessible from the Panoramic view of Marquenterre Park) is one of Europe's top bird reserves, offering trails and hides to observe thousands of migratory birds.
The region is characterized by diverse coastal landscapes. You'll find extensive sand and tidal flats, salt marshes, and dunes, particularly prominent in the Baie de Somme and Authie Bay. There are also beautiful beaches like Fort-Mahon-Plage Beach and scenic viewpoints such as Cape Hornu, offering panoramic vistas of the bay.
Yes, there are numerous hiking opportunities. You can find trails that explore the diverse landscapes of the Baie de Somme and its surroundings. For specific routes, check out the Hiking around Le Crotoy guide, which includes options like the easy 'Bassin de chasse du Crotoy — loop from Le Crotoy' and more challenging routes through the Somme Bay and Marquenterre Park.
The Bay of Somme experiences a dramatic 11-meter tidal range, which completely transforms the landscape. Visiting during both high and low tides offers different perspectives. Spring and autumn are excellent for birdwatching, especially at Parc du Marquenterre, due to migratory patterns. Summer provides warmer weather for beach activities and longer daylight hours for exploration.
Absolutely. Cape Hornu is a renowned viewpoint near Saint-Valery-sur-Somme, offering expansive views of the bay and its wildlife. The Panoramic view of Marquenterre Park also provides a 360-degree perspective of the park and the Baie de Somme from a wooden platform.
Beyond hiking, the area offers various outdoor activities. You can enjoy running along the coast, with routes like 'Le Crotoy Beach – Le Crotoy loop' detailed in the Running Trails around Le Crotoy guide. Gravel biking is also popular, with routes such as 'Le Crotoy – Cap Hourdel Lighthouse loop' available in the Gravel biking around Le Crotoy guide.
Yes, the region holds significant history. Cape Hornu, for instance, is near Saint-Valery-sur-Somme, a medieval town with a rich past, including William the Conqueror's departure for England and Joan of Arc's imprisonment. The Baie de Somme itself has been a strategic location throughout history.
Le Crotoy Beach is distinctive because, unusually for the northern French coast, it faces south. This orientation allows it to catch the sun throughout the day. At low tide, the bay transforms into a vast expanse of sand and tidal flats, perfect for leisurely walks and exploration.
Beyond the main highlights, the Le Crotoy Municipal Marsh is a local treasure often likened to a miniature Camargue. It's rich in biodiversity, home to storks, swans, ponies, Highland cows, and the green tree frog, offering an immersive experience for flora and fauna lovers.
Visitors frequently highlight the breathtaking natural beauty and tranquility of the area. The opportunity to observe diverse wildlife, especially the seal colonies and migratory birds, is a major draw. The ever-changing landscapes due to the tides and the panoramic views from various points are also highly appreciated.


Extend your search for the best caves by checking out these guides of the top ones around Le Crotoy: