Best canyons around Bouillon are characterized by the deep, steep-sided valleys and impressive meanders carved by the Semois River. These natural formations offer a canyon-like experience within the Ardennes region. The area provides diverse landscapes for outdoor activities, including hiking and exploring unique geological features. Visitors can discover a variety of natural and historical sites nestled within these riverine gorges.
Last updated: June 16, 2026
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Hiking around Bouillon
Running Trails around Bouillon
The paths are sometimes narrow, but perfectly doable. Where necessary, there is sometimes a small paved section before returning to pure nature.
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A beautiful stretch along the water, the route is easy to do with a dog. (We had a shepherd.)
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Impressive and quickly accessible via a small junction
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incredible route and view between the rocks
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This region used to be frequented by witches and fairies and many places have reminders of their existence. Under the slopes of the Hultai plateau, near Roche Percée, the Semois dug a deep gorge, a haven for fish that do not want to fight needlessly against the violent currents. At high tide, the fishermen fill their baskets... Enjoy this spectacle during your passage.
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This narrow passage between the rocks seems to have been created with a gigantic sword stroke. A narrow bridge formed by 2 beams allows walkers to pass over the water.
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Caves always have something mystical, even in this rock a hermitage or hermitage has been cut out. The cave is called Saint-Remacle. It is a place full of history and legends. But what are these caves? It is an oratory of three natural caves in a rock face above the Semois. The caves in the schist are connected and further carved. Knowing more? Come here and discover...
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The Bouillon region is known for the dramatic, steep-sided valleys and impressive meanders carved by the Semois River. These natural formations offer a unique canyon-like experience within the Ardennes, characterized by lush forests, green cliffs, and picturesque villages, rather than traditional narrow canyons.
You can explore several stunning natural features and viewpoints. Don't miss La Roche Percée, a gorge with a unique rock formation. Other notable spots include Le Tombeau du Géant (The Giant's Tomb) in Botassart, offering a striking view over a deep Semois meander, and the Bouillon Belvedere, which provides panoramic views of Bouillon Castle and the valley.
Yes, the region offers interesting geological sites. La Roche Percée is a notable gorge with a narrow passage between rocks, formed by natural processes. Additionally, the Saint-Remacle Caves are an oratory of three natural caves carved into a rock face above the Semois, rich in history and legends. While not in Bouillon itself, the Fondry des Chiens near Nismes is a remarkable geological site often referred to as "Belgium's Grand Canyon," formed by limestone erosion.
The region is ideal for various outdoor activities. Kayaking and canoeing on the Semois River are very popular, offering a unique perspective of the valley. Hiking is also a favorite, with numerous trails providing access to viewpoints and natural sites. You can also find options for cycling and mountain biking.
Yes, the Semois River offers several kayaking and canoeing routes. Popular options include Poupehan to Frahan (4 km), Bouillon to Poupehan-sur-Semois (15 km), and Bouillon to Frahan (20 km). These trips allow you to paddle through picturesque landscapes, past lush forests, and beneath impressive cliffs. The river is generally calm and accessible for all skill levels. For more information, you can check Visit Wallonia's kayaking guide.
Bouillon offers a variety of hiking trails that explore the canyon-like valleys. Popular options include the challenging "14 Panorama Route" around Bouillon, which features numerous scenic overlooks, and the Rochehaut Ladders Trail. You can find more hiking routes, including moderate and difficult options, on the Hiking around Bouillon guide.
Yes, the Bouillon area provides excellent opportunities for both mountain biking and cycling. You can find various routes, from moderate to difficult, that take you through the scenic Semois Valley and offer views of the canyon-like landscapes. Explore options in the Cycling around Bouillon guide and the MTB Trails around Bouillon guide.
Absolutely. Kayaking and canoeing on the Semois River are generally calm and accessible for families. Many viewpoints, such as the one at Lourdes Grotto 1923, are easily accessible and offer scenic spots for relaxation. Shorter, less strenuous hiking trails are also available, and the overall natural beauty provides an engaging experience for all ages.
The best time to visit for outdoor activities like kayaking, hiking, and enjoying the viewpoints is typically from spring through early autumn (April to October). During these months, the weather is generally pleasant, and the natural scenery is at its most vibrant. Some trails, like Descent Along the Sautou Stream, can be very slippery in rainy weather, so consider conditions.
Visitors particularly enjoy the breathtaking landscapes and preserved scenery of the Semois River valley. The unique rock formations like La Roche Percée and the historical intrigue of the Saint-Remacle Caves are highly appreciated. The opportunity for an unforgettable adventure in the heart of the Ardennes nature, whether paddling or hiking, is a major draw.
Yes, the Saint-Remacle Caves are a significant historical and cultural site. These three natural caves, carved into a rock face above the Semois, served as an oratory and are steeped in local history and legends. Additionally, the Lourdes Grotto 1923 offers a unique religious site with panoramic views.

