Best canyons around Grez-Doiceau refer to the deeply incised river valleys and gorge-like features that cut through the region's undulating landscape. This area, part of the "Ardennes brabançonnes," is watered by rivers like the Train, Dyle, and Nethen, which have carved distinct valleys. These natural features offer diverse scenery, including fields, forests, and water features, making them popular for outdoor activities. The terrain provides picturesque environments for exploration.
Last updated: August 24, 2026
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A sunken road is a road that is so deeply worn that it lies between two slopes. It is the result of centuries of use and erosion. The most beautiful sunken roads can be found especially in hilly areas with a subsoil that easily forms steep walls, such as in Haspengouw and Hageland.
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After a lot of rainfall it can look quite acrobatic...
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You have only just left the center and you are already far from civilization in this sunken road...
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Nice section, especially if you drive downhill, you can reach a nice speed
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Beautiful sunken road that goes steeply up
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Hollow roads: a blessing for nature with their special ecosystems and a blessing for hikers on hot days.
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Very nice passage of an old important path
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Around Grez-Doiceau, 'canyons' refer to deeply incised river valleys and gorge-like features, primarily sunken lanes and natural depressions carved by rivers like the Train, Dyle, and Nethen. These are not dramatic, large-scale canyons but rather picturesque, often forested, and undulating terrains perfect for hiking and nature exploration.
You can explore several interesting gorge-like features. The Hollow Way and Steps Huldenberg offers a mix of technical sections and scenic views. Another significant spot is the Deep sunken lane, a natural monument noted for its depth and unique ecosystem. The Hollow Way is also appreciated for its natural beauty.
The valleys offer diverse scenery, including small fields, poplar plantations, swamp groves, meadows, and hay meadows. You'll encounter water features like the rivers Train and Dyle, and ponds such as the Étang de Pécrot. The terrain is undulating, with both agricultural areas and forests, providing varied landscapes for nature enthusiasts.
Yes, many trails through these valleys are suitable for families and dogs. The paths offer direct contact with nature and characteristic reliefs. While some sections, like the stairs at Hollow Way and Steps Huldenberg, can be a bit technical, options often exist to avoid the most challenging parts, making them accessible for various skill levels.
The valleys around Grez-Doiceau are beautiful year-round. Spring brings lush greenery and blooming flora, while autumn offers vibrant fall colors. Summer provides pleasant conditions for longer walks, and even in winter, the quiet, often frosted landscapes have a unique charm. Be aware that after heavy rainfall, some sunken lanes, like the Beautiful sunken lane, can become quite muddy and challenging.
Beyond exploring the gorge-like features themselves, the region offers a variety of outdoor activities. You can find numerous road cycling routes, such as those detailed in the Road Cycling Routes around Grez-Doiceau guide. There are also mountain hikes, like the 'Fourmilière loop', available in the Mountain Hikes around Grez-Doiceau guide, and running trails, including challenging routes like the 'Château de Nethen – Château Deprez loop' from the Running Trails around Grez-Doiceau guide.
Some sections, particularly sunken lanes like Hollow Way, can be fast and tricky, especially for cyclists descending. After heavy rainfall, paths can become muddy and require careful footing. The Hollow Way and Steps Huldenberg has stairs that can be a bit technical. Always wear appropriate footwear and be mindful of changing trail conditions.
Visitors appreciate the tranquility and natural beauty of the area. The unique ecosystems within the sunken roads are a blessing for nature lovers, and the contrast between the depth of these paths and the vastness of the rolling fields is often highlighted. Many enjoy the peaceful escape from traffic and crowds, making it ideal for relaxing walks and connecting with nature.
While the focus is on natural landscapes, the region's history is subtly present. The Stockemstraat, for example, is described as an old, deep sunken road, indicating its historical use as an important path. The broader area, including Grez-Doiceau itself, has a rich history, with its name appearing in documents as early as the 12th century. For more historical context, you can refer to the Wikipedia page for Grez-Doiceau.
Grez-Doiceau and its surrounding villages offer various amenities, including cafes and restaurants where you can refuel after your outdoor activities. While specific establishments directly adjacent to every trail might be limited, you'll find options within a short distance in the local communities.
The region features rivers like the Train and Dyle, and ponds such as the Étang de Pécrot. While these add to the scenic beauty and ecological richness, specific designated wild swimming spots are not widely promoted. It's generally advisable to check local regulations and safety information before considering swimming in natural waters.
The terrain around Grez-Doiceau is generally undulating, offering a mix of easy and intermediate paths. While many trails are accessible, some sections, particularly within the sunken lanes, can be steep, muddy, or slightly technical, especially after rain. Highlights like Hollow Way and Steps Huldenberg are rated as intermediate, indicating some challenge.


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