Chartreuzenbos

Chartreuzenbos is roughly a 70-hectare forest in the municipality of Holsbeek, in the Belgian province of Flemish Brabant, regarded as one of the most important natural areas of the Hageland region. The forest spreads across the hilly terrain of the valleys of the Winge and Motte streams, an area known for its pronounced relief and its network of sunken lanes (holle wegen) carved over centuries by erosion, foot traffic and cart wheels.

Where does the name come from?

The name refers to the forest's former owners: the Carthusian monastery of Leuven. Until the French Revolution at the end of the 18th century, the land belonged to the Carthusian order, a contemplative religious community known for its strict rule and for choosing sites away from towns. After church properties were secularised, the forest passed into other hands, but the name Chartreuzenbos survived as a reminder of its monastic past.

What kind of forest is it?

Today Chartreuzenbos is largely a chestnut-and-oak forest, meaning the tree cover is dominated by sweet chestnut and oak. Because of its ecological value, the area is protected at European level as part of the Natura 2000 site "Valleys of the Winge and Motte with valley slopes" (site code BE2400012). This designation aims to safeguard the diversity of forest and valley habitats found here, including plant communities tied to the moist valley bottoms as well as drier, forested slopes.

What is happening in the forest right now?

The Flemish Agency for Nature and Forests (Agentschap voor Natuur en Bos, ANB) is carrying out work to make the forest more natural and more resilient to a changing climate. Over the current winter, scattered regeneration plots of 10 to 25 ares each are being cleared. In the winter of 2026–2027 these plots will be replanted with a mix of native tree and shrub species. The goal is to turn the present, fairly uniform chestnut-and-oak stand into a varied, multi-species broadleaf forest that is better adapted to future conditions and less vulnerable to pests or diseases that target a single species. The forest has also gained its first "nature oasis" (natuuroase), a spot set aside for forest bathing (bosbaden) — quiet, contemplative time spent among the trees.

What can visitors do in Chartreuzenbos?

The forest is popular with hikers and mountain bikers alike. Among the marked routes is the Chartreuzenbergwandeling, a roughly 6.9 km walking trail, while a longer loop connecting Holsbeek with the surrounding Chartreuzenbos area (about 12.7 km) is rated as moderately challenging, with around 260 metres of elevation gain and a walking time of 3 to 3.5 hours. The scenic sunken lanes, varied terrain and mature tree cover make a walk here noticeably different from a typical flat lowland forest stroll. The municipality of Holsbeek also runs a network of play areas that combine recreation for children with proximity to nature, some of them located near the forest.

Frequently asked questions

Is Chartreuzenbos a protected area? Yes, it forms part of the Natura 2000 site "Valleys of the Winge and Motte with valley slopes."

How large is the forest? It covers approximately 70 hectares.

Where does the forest's name come from? From its former owners, the Carthusian monastery of Leuven, who held the land until the French Revolution.

What can visitors do there? Walking trails such as the Chartreuzenbergwandeling, scenic sunken lanes, and a dedicated forest-bathing spot.