Koppenberg
Only 600 m, but 11.4% on average on narrow, rough cobbles, with ramps of up to 22%. A single slip in the bunch and the riders behind have to walk.
- Start: Melden (Oudenaarde)
- Length: 0.6 km
- Elevation gain: 65 m
- Average gradient: 11.4%
- Max gradient: 22%
- It was first climbed in the Tour of Flanders in 1976.
- In 1987 Jesper Skibby, leading, was knocked down and his wheel run over by a race official's car; the climb was then left out until 2002.
- Since 2022 it has also been part of the women's Tour of Flanders.
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