Canyons around Kortenberg refer to specific geological features within a largely flat to gently undulating landscape. While the region of Flanders, where Kortenberg is situated, does not feature dramatic canyon formations, it offers natural areas like forests and sunken roads. These features provide varied terrain for outdoor activities. The area's natural attractions include significant deciduous forests such as Silsombos and Warandebos.
Last updated: October 31, 2026
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The sunken road itself is used by the more adventurous and probably younger cycling adventurer, judging by the small sand-jumping hills constructed in it.
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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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Lovely walking path that winds along an old sunken road.
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Currently difficult to walk, very swampy.
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This narrow sunken road resembles a rain-soaked deep stream between the trees...
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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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The term 'canyons' in Kortenberg refers to unique geological features known as hollow ways or sunken lanes. These are deeply eroded paths, often found within forests, that have been worn down over centuries by use and natural processes. They are not the dramatic, deep canyons found in other parts of the world, but rather offer distinct terrain for hiking and cycling.
One notable feature is Hollow Way and Steps Huldenberg, which includes a technical section popular for mountain biking and offers views from the top. Another is Deep sunken lane, known for its impressive depth, reaching up to 10 meters in some sections within a forest.
While some hollow ways can be challenging, many offer accessible sections suitable for families. The surrounding forests, like Silsombos and Warandebos, provide gentler paths for walks. When exploring the sunken lanes, it's advisable to check the specific route difficulty, as some can be steep or muddy.
The hollow ways and forests around Kortenberg can be enjoyed year-round. Spring (late May to early June) is particularly beautiful in areas like Silsombos, when wild orchids bloom. Autumn offers vibrant foliage. During wet periods, some sunken lanes can become muddy and more challenging, so appropriate footwear is recommended.
The area around Kortenberg is excellent for various outdoor activities. You can find numerous routes for running, cycling, and road cycling. For example, explore running trails like the 'Vijfwegen Crossroads – Hollow Cobblestone Path loop' or cycling routes such as the 'Lake in the Park van Tervuren loop'. You can find more details on these activities in the Running Trails around Kortenberg and Cycling around Kortenberg guides.
Yes, some hollow ways are popular with mountain bikers. For instance, Hollow Way and Steps Huldenberg features a technical section that is suitable for mountain biking. Another, Hollow Way, is known for its fast and potentially tricky descents, appealing to cyclists seeking a challenge.
Many of the natural areas and paths around Kortenberg, including those leading to and through the hollow ways, are dog-friendly. It's always a good idea to keep dogs on a leash, especially in nature reserves or areas with wildlife, and to be mindful of other visitors.
The duration depends on the specific route and your activity. Many of the hollow ways are integrated into longer hiking or cycling loops, which can range from a couple of hours to half a day. Shorter walks focusing solely on a particular sunken lane might take 30 minutes to an hour.
The double sunken lane on the flank of the Meesberg offers a unique view, with one side being a GR path and the other an MTB route, separated by a dividing berm. Another interesting feature is Vernagelstraat, a narrow sunken road that resembles a rain-soaked deep stream, often used by adventurous cyclists.
The forests like Silsombos and Warandebos are rich in biodiversity. Silsombos is a significant deciduous forest with diverse woodland and damp meadows, home to various birds and occasionally roe deer. It's particularly known for wild orchids in late spring. Warandebos features varied flora due to differences in elevation and soil.
No, wild swimming is not typically associated with the hollow ways or sunken lanes around Kortenberg. These features are eroded paths, not bodies of water suitable for swimming. The region is characterized by forests and undulating landscapes, not large rivers or lakes for wild swimming.
Given the nature of these features, sturdy, waterproof footwear is highly recommended, especially after rain, as paths can become muddy and slippery. Layered clothing is advisable for varying weather conditions, and if cycling, appropriate safety gear is essential due to potentially fast and tricky descents.


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