4.8
(32)
1,066
runners
72
runs
Jogging routes in Demervallei Tussen Aarschot En Diest traverse a varied landscape, situated at the transition between the flat Kempen region and the hilly Hageland. The area is characterized by the meandering Demer river, its floodplains, and former meanders, creating a diverse terrain for runners. To the south, sandstone hills provide gentle gradients, while the north features a series of sand dunes. Extensive nature reserves, such as the Demerbroeken, offer tranquil environments with wetlands, grasslands, and forests.
Last updated: October 7, 2026
192
runners
6.22km
00:39
10m
10m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(4)
62
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(1)
56
runners
23.5km
02:29
40m
40m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(1)
27
runners
5.84km
00:42
50m
50m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.8
(4)
39
runners
4.88km
00:35
40m
50m
Easy run. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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A surprising sight. Whether this will attract many birds? In any case, it is a call to protect nature better.
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The stretch of the Demer between Testelt and Langdorp is one of the most picturesque and ecologically valuable parts of the entire Demer Valley. Where the river was often straightened elsewhere, here you will still find the authentic, strongly meandering fossil meanders and riverbeds.
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Quote from Ernest Claes' famous book, "De Witte" from 1920: "First the piece of bacon went in, then a sandwich with two pears... then he lay down on his back with his head on his jacket, knees drawn up and his bare feet in the grass. Hey! The virtue he got from it."
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The historic dam of Zichem on the Demer was demolished in the 1960s. The signs on the wall still commemorate the 'Stuw Zichem'.
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The village center of Testelt is protected as a village view. The protection includes the Sint-Pieter parish church with the surrounding streets, including the town hall, the presbytery, the oil store, the water mill, and village houses and townhouses from mainly the 19th century.
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The Watermolen van Testelt, also called the Abdijmolen, is a historic, protected water mill located on the Demer. It is one of the oldest known water mills in the region and has a rich history closely linked to the nearby Averbode Abbey. The mill already existed before 1150 and was first mentioned in writing in 1151. Around 1594-1598, the mill was destroyed by Spanish troops. In 1608, the building was restored, a year that can still be read on the side facade. The mill has a heavy substructure of typical Hageland iron sandstone and features a wooden undershot wheel. Since 1981, the water mill has been officially recognized as a protected monument.
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The Demerbroeken form an extensive piece of nature in the wide valley of the river Demer, between Testelt, Zichem, Averbode and Diest. For centuries, this landscape was used as meadowland and by peat cutters, which left traces in the fens and quaking bogs. You will walk through open grasslands, wet swamp forests and along quiet bodies of water. Writer Ernest Claes also found his inspiration here. The backyard of his birthplace borders the Demerbroeken.
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The Demerbroeken form an extensive piece of nature in the wide valley of the Demer, between Testelt, Zichem, Averbode and Diest. For centuries, this landscape was used as hay meadows and by peat cutters, which left traces in the fens and quaking bogs. You walk through open grasslands, wet swamp forests and along quiet bodies of water. Writer Ernest Claes also found his inspiration here. The backyard of his birthplace borders the Demerbroeken.
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0
There are over 50 running routes in Demervallei Tussen Aarschot En Diest, offering a wide variety of distances and difficulty levels. The komoot community has explored these trails over 800 times, with routes ranging from easy strolls to challenging long-distance runs.
The Demervallei offers a diverse terrain, situated at the transition between the flat Kempen region and the hilly Hageland. You'll find paths along the meandering Demer river, through extensive nature reserves like the Demerbroeken, and across gentle sandstone hills to the south, as well as sand dunes to the north. This mix provides varied gradients suitable for all types of runners.
Yes, the Demervallei offers routes for all fitness levels. You can find easy, moderate, and difficult trails. For example, there are 4 easy routes, 45 moderate routes, and 10 difficult routes, ensuring options for beginners and experienced runners alike.
The running routes in Demervallei Tussen Aarschot En Diest are highly rated by the komoot community, with an average score of 4.9 stars from over 30 reviews. Runners often praise the tranquil natural environment, the varied landscapes, and the well-maintained footpath network that follows the riverbanks and passes through nature reserves.
Many of the running routes in the Demervallei are circular loops, perfect for starting and ending your run at the same point. An example is the moderate Demerbroeken Nature Reserve – Maagdentoren Zichem loop from Testelt, which is 6.8 miles (10.9 km) long and offers scenic views.
The Demervallei is generally dog-friendly, with many trails suitable for running with your canine companion. However, specific rules may apply in certain nature reserves like the Demerbroeken. It's always best to keep your dog on a leash, especially in protected areas, to respect wildlife and other trail users.
While running, you can encounter various natural sights and historical landmarks. The region is known for its meandering Demer river, extensive wetlands, and diverse ecosystems. Notable attractions include the Demerbroeken Nature Reserve, the historic Maagdentoren Zichem, and various old mills like the Great Mill of Zichem and the Testelt Water Mill.
Yes, for those seeking a greater challenge, the Demervallei offers several long-distance running trails. The Demerbroeken Nature Reserve – Footbridge over the Weefberg Pond loop from Zichem is a challenging 24.5 miles (39.5 km) route, and the Nature Marathon – The Famous Lekdreef loop from Zichem covers 20.4 miles (32.9 km) through varied natural scenery.
The Demervallei is beautiful year-round, but spring and autumn often offer the most pleasant conditions for jogging with mild temperatures and vibrant natural colors. The varied relief and ecosystems create microclimates that are enjoyable in different seasons, though some wetland areas might be wetter after heavy rain.
Absolutely. While many routes are moderate, there are 4 easy routes perfect for beginners or families looking for a gentler run. These trails typically feature flatter terrain and shorter distances, allowing everyone to enjoy the natural beauty of the Demervallei.
Starting points like Testelt railway station offer convenient access and parking for exploring the trails. The towns of Aarschot and Diest, along with historical settlements like Zichem and Langdorp, are situated on the valley's edges, some directly along the Demer, providing various access points for public transport and parking.
Yes, the Demer river is central to the valley, and many routes follow its naturally meandering course. These paths offer picturesque views of the river, its floodplains, and former meanders, providing a tranquil running experience alongside the water.


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