Knokteberg (Côte de Trieu)
Climb · Flanders
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Knokteberg (Côte de Trieu) is a 1.9 km cycling climb averaging 4.9% (+91 m), rising from 25 m to 116 m in Flanders.
1.9 km · +91 m · 4.9% avg · ~10.5% max · 25 → 116 m
Stats computed from OpenStreetMap and satellite elevation data — approximate.
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Gradient by colour: ● <3% ● 3–6% ● 6–9% ● 9%+
Where it bites
Steepest 250 m: 11.0% (km 1.1–1.3).
| section | to | avg |
|---|---|---|
| 0–250 m | 27 m | 0.7% |
| 250–500 m | 30 m | 1.1% |
| 500–750 m | 33 m | 1.3% |
| 750–1000 m | 40 m | 3.0% |
| 1000–1250 m | 62 m | 7.9% |
| 1250–1500 m | 82 m | 8.4% |
| 1500–1750 m | 109 m | 10.2% |
What it’s like to ride
Rue du Trieu leaves Russeignies at a gentle tilt, stiffens across the open fields, then flattens off in the middle just long enough to tempt you into spending what you have. The last stretch is where it collects the debt: the road swings into the trees of the Kluisbos and kicks to around 13% just below the summit, so a fast start is paid for in the forest. It is a winding asphalt road the whole way, no cobbles. The top comes at 141 m by the hamlet of Knokt, where Rue du Trieu becomes Knoktstraat and you cross out of Wallonia into Flanders, which is why the hill carries two names. From there the ridge runs on to the Kluisberg summit, where the woods hold several tearooms and restaurants and a disused lookout tower, and the Oude Kwaremont begins just to the northeast.
History
The Ronde van Vlaanderen climbed it 14 times, every edition from 1993 to 2003 and again in 2007, 2010 and 2011, always placed after the Kluisberg and before the Oude Kwaremont. It is a fixture of the Flemish spring beyond that: E3 Prijs Harelbeke, Omloop Het Nieuwsblad, Kuurne-Brussel-Kuurne, Halle-Ingooigem and the Circuit Franco-Belge have all used it. Dwars door Vlaanderen rebuilt its route around the climb in 2018, taking the 1.9 km line at 4.9% three times, at roughly km 90, 115 and 147 of a 180 km race, the last pass with about 34 km left, and it was still in the finale of the 2026 edition, climbed twice. Tiesj Benoot has described it as a climb that suits him: a solid two minutes straight on the pedals.
Worth stopping near the climb
More climbs in Flanders
Common questions
- How long and steep is Knokteberg (Côte de Trieu)?
- Knokteberg (Côte de Trieu) is a 1.9 km cycling climb averaging 4.9% (+91 m), rising from 25 m to 116 m in Flanders.
- Where is Knokteberg (Côte de Trieu) steepest?
- The steepest 250 m averages 11.0%, between km 1.1 and km 1.3 of the climb.