Col du Rosier

This 50km cycling route takes you through the wooded hills between Stoumont, Spa and Theux, culminating in the iconic Col du Rosier , one of Wallonia's most famous mountain passes. The loop blends heritage, nature, gradual climbs and steep valleys, all within the characteristic landscapes of the Spa region.

The route starts in Stoumont , from where you reach La Gleize , then descend gradually towards Moulin du Ruy and Ruy , following the first wooded slopes. It is in this bucolic setting that the ascent of the Col du Rosier begins, one of the most consistent peaks in the area.

Once you've crossed the Col du Rosier , you continue towards Les Mousseux and the Forest and Water Museum, before crossing the Mambaye woods. You then enter Spa, and follow the Wayai stream through Spixhe and Theux, enjoying beautiful rolling sections and a verdant setting.

The return journey takes place via the perched villages of Mont, Le Ménobu, Hautregard, Desnié and Monthouet , before a final descent towards Stoumont, in the middle of the Ardennes forests.

• Length: 4.4 km
• Elevation gain: 257m
• Steepest section: 9.6%
• Average slope: 5.8%

• Col du Rosier , a famous climb in the Ardennes classics
• La Gleize and its historical heritage
• Museum of the Forest and Waters , dedicated to local biodiversity
• Mambaye Woods , a vast forest massif
• The spa town of Spa and its springs
• Wayai Stream , a bucolic setting between Spa and Theux
• Typical villages: Stoumont , Ruy , Theux , Desnié , Monthouet …

The Col du Rosier , with its regular switchbacks and impeccable tarmac, is a legendary climb in Belgian cycling. It regularly features in the Liège-Bastogne-Liège route, offering a constant test of endurance for the riders.