Natural monuments around Boismont, particularly in the Somme department, are situated within the ecologically significant Baie de Somme natural site. This region features diverse landscapes including wetlands, marshes, and coastal areas, providing habitats for varied flora and fauna. It offers opportunities to observe significant bird breeding grounds and expansive natural beauty. The area is an integral part of the Grand Site de France Baie de Somme.
Last updated: May 7, 2026
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The bay of summer, on our trip it was low tide.
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you will see lots of seals
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At Cape Hornu you can enjoy a panoramic view of the bay and its wildlife. You can follow the path along the coast, passing by the Chapelle des Marins, a small chapel dedicated to sailors who lost their lives at sea. You will also discover the charming town of Saint-Valery-sur-Somme, with this medieval street plan, its ancient ramparts and its colorful houses. It's a great way to experience the beauty and history of this area.
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Crotoy marsh at La Bassée Crotoy marsh at La Bassée / Somme Bay nature reserve / Marquenterre ornithological park / The Marquenterre dune massif, the mollières de l'Authie and the bordering enclosures / The Crotoy marsh and the adjacent foreshore, Le Crotoy
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Cap Hornu is a cape located near Saint-Valery-sur-Somme, on the south bank of the Bay of Somme. The name Cap Hornu comes from the Picard word “hornu”, which means “horned” or “pointed”, and refers to the shape of the cape. The cape was also known as Cap Saint-Valery in the past. The history of Cap Hornu is closely linked to that of Saint-Valery-sur-Somme, which was a strategic port and a medieval town that witnessed many historical events. In 1066, William the Conqueror departed from Saint-Valery-sur-Somme with his fleet to invade England. In 1431, Joan of Arc was imprisoned in Saint-Valery-sur-Somme before being transferred to Rouen. In 1568, a massacre of Huguenots took place in Saint-Valery-sur-Somme after a battle between Catholics and Protestants
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Be careful, the area fills up quickly at high tide.
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At the entrance to the village, there is a splendid view over the Somme estuary and the small port of Hourdel.
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Around Boismont, particularly in the Somme department, you can explore diverse natural monuments including expansive coastal areas, wetlands, and estuaries. Highlights include the panoramic views from Cape Hornu, the vast Baie de Somme with its mud flats and salt marshes, and the scenic View of the Somme Estuary and the port of Le Hourdel. The region is rich in ecological significance, offering varied landscapes from beaches to marshlands.
Yes, the natural monuments around Boismont are excellent for wildlife observation. The Baie de Somme is renowned for its marine animals, water birds, and seals. You can often spot seals from the View of the Somme Estuary and the port of Le Hourdel. The Marais de Boismont is home to rare flora like the neglected orchid and Baudot's buttercup, and birds such as the Little Owl. The Bois aux Carottes is a significant breeding ground for Grey Herons, Little Egrets, Eurasian Spoonbills, and Cattle Egrets.
The area around Boismont offers a variety of outdoor activities. You can enjoy running, road cycling, and mountain biking on numerous trails. For example, there are running routes like the 'View of the Somme ⛵ – Somme Bay 🔭 loop from Saint-Valery Canal' and road cycling routes such as 'St. Valery sur Somme – Strada biancha Picarda loop from Saint-Valery Port'. You can find more details and routes on the Running Trails around Boismont, Road Cycling Routes around Boismont, and MTB Trails around Boismont guide pages.
Many natural monuments around Boismont are family-friendly. Cape Hornu, the Baie de Somme, and the View of the Somme Estuary and the port of Le Hourdel are all suitable for families. The Pond of the Baie de Somme Picardie Maritime Regional Nature Park is a pleasant spot with ducks and swans, offering picnic opportunities, though swimming is prohibited.
The natural monuments around Boismont, particularly the Baie de Somme, are beautiful year-round. However, for birdwatching, spring and autumn migrations offer spectacular sights. Summer provides pleasant weather for coastal walks and enjoying the beaches. The wetlands and marshes have unique flora that can be appreciated from spring through early autumn.
Yes, the region around Boismont is rich in history. Cape Hornu and the Baie de Somme have significant historical ties, including William the Conqueror's departure for England and Joan of Arc's imprisonment in nearby Saint-Valery-sur-Somme. You can explore the charming town of Saint-Valery-sur-Somme with its medieval street plan, ancient ramparts, and colorful houses, which is easily accessible from many of the natural sites.
While specific trails within Boismont's immediate natural monuments like Marais de Boismont or Bois aux Carottes are best explored locally, the wider Baie de Somme area offers numerous paths. You can follow coastal paths from Cape Hornu, or explore the trails around the Marais du Crotoy to La Bassée. Many routes in the region are suitable for walking, offering views of the estuary, marshes, and coastline.
Given the diverse landscapes, including coastal areas and wetlands, it's advisable to wear comfortable walking shoes suitable for varied terrain. Layers of clothing are recommended as coastal weather can change quickly. A waterproof jacket can be useful, especially during cooler or wetter seasons. Don't forget sun protection and binoculars for wildlife viewing.
While this guide focuses on Boismont in the Somme department, if you are referring to Boismont in the Val-d'Oise department, it serves as a gateway to the Parc naturel régional du Vexin français. This regional natural park offers diverse landscapes including hillsides, marshes, woods, and historical elements like mills and wash houses, ideal for hiking, cycling, and horseback riding.
Visitors particularly appreciate the expansive natural beauty and the rich biodiversity. The panoramic views of the Baie de Somme, the opportunity to spot seals and a wide variety of birds, and the peaceful atmosphere of the marshes and coastal paths are frequently highlighted. The blend of natural exploration with historical context also adds to the appeal.
While specific public transport options directly to every natural monument might be limited, the larger towns in the Baie de Somme region, such as Saint-Valery-sur-Somme, are generally accessible by regional buses or trains. From these towns, you may need to walk, cycle, or use local taxis to reach more secluded natural sites. It's recommended to check local transport schedules in advance.


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