5.0
(1)
369
runners
04:14
30.4km
1,130m
Running
The Trail du Jambon 29K in Semois Valley National Park is a difficult 18.9-mile jogging route with 3706 feet of elevation gain.
Last updated: February 26, 2026
Tips
Includes a segment that may be dangerous
A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.
After 23.5 km for 140 m
Waypoints
Start point
Get Directions
5.91 km
Highlight • Settlement
Translated by Google •
Tip by
22.7 km
Highlight • Viewpoint
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Tip by
29.0 km
Highlight • Natural Monument
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Tip by
30.4 km
End point
Way Types & Surfaces
Way Types
18.8 km
8.66 km
1.93 km
792 m
148 m
Surfaces
21.6 km
4.39 km
1.66 km
1.26 km
967 m
148 m
< 100 m
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Elevation
Highest point (370 m)
Lowest point (170 m)
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Weather
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Saturday 9 May
17°C
11°C
69 %
Additional weather tips
Max wind speed: 15.0 km/h
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This route was planned by komoot.
This challenging route is designed for experienced joggers. On average, it takes about 4 hours and 13 minutes to complete, but this can vary significantly based on your fitness level and the technical nature of the terrain.
No, the Trail du Jambon 29K is classified as 'difficult' and is not suitable for beginners. It demands excellent physical condition, good technical skills, and prior experience with demanding trail running due to its steep ascents, descents, and technical sections.
The Trail du Jambon 29K typically starts from Vresse-sur-Semois. While specific parking details for the trailhead aren't provided, Vresse-sur-Semois is the general starting point for this popular event. It's advisable to check local parking options in the village before your visit.
The terrain is highly technical, featuring steep ascents and descents with a significant elevation gain of approximately 1130 meters over 30.4 km. You can expect a mix of forest paths, rocky sections, and potentially muddy areas, characteristic of the Semois Valley's rugged landscape. Some parts may even require 'alpine experience' due to their difficulty.
You can expect breathtaking and panoramic views of the Semois Valley. The trail winds through the exceptional natural reserve of Bohan-Membre, offering a 100% natural environment. A highlight is 'Le Jambon de la Semois,' named for the ham-like shape of a river meander, which provides a spectacular vista. You'll also pass by the Roche de Saloru Observation Tower and Viewpoint and the Table des Fées Rock Formation.
Given its challenging nature and potential for technical sections, the best time to jog this trail is during drier months, typically late spring, summer, and early autumn. Avoid periods of heavy rain or snow, as conditions can become very slippery and more dangerous. Always check local weather forecasts before heading out.
While the Semois Valley National Park generally allows dogs, specific rules for this challenging trail may apply. Due to the technical terrain and steep sections, it might not be suitable for all dogs, especially those not accustomed to difficult trails. Always keep your dog on a leash and ensure they are well-behaved and physically capable of handling the route.
Generally, there are no specific permits or entrance fees required to access the trails within the Semois Valley National Park for day use. However, it's always a good idea to check the official park website or local tourism office for any updated regulations or specific event-related requirements, especially if you plan to participate in an organized race.
For this difficult trail, you should bring appropriate trail running shoes with good grip, sufficient water and nutrition, a first-aid kit, a map or GPS device (like the komoot app) as cell service can be unreliable, and weather-appropriate clothing. Due to the technical sections, poles can also be beneficial for stability on ascents and descents.
Yes, the Trail du Jambon 29K intersects with several other well-known paths. Significant portions of the route overlap with the European long distance path E3 - part Belgium and the GR 16 Sentier de la Semois. You'll also find sections that follow Le Bois Jean, La Vallée des Baraques, and GRP 161 Tour du Pays de Bouillon Parcours principal.
The Trail du Jambon 29K is known for its demanding nature and stunning scenery, aptly summarized by the slogan 'Plein les yeux, plein les guiboles' (full in the eyes, full in the legs). An insider tip is to start early to allow ample time, especially if you plan to take in the views. Be prepared for a high elevation-to-kilometer ratio, which is considered 'unparalleled in Belgium,' meaning consistent and challenging climbs and descents throughout the entire route.