thechainstay.com/koppenberg24/

What is the Koppenberg 24? Nestled in the Vlaamse Ardennen is the famous cobbled climb of the Koppenberg. Spanning 550m (just over a third of a mile) and rising 78 meters (256ft) to give it an average gradient of 11% with a max of 22% at its steepest! This climb will be the centerpiece of our 24 hour climb-a-thon fundraiser for young cyclists coming to Belgium. Gregg Germer, co-owner of The ChainStay, will attempt to ride the Koppenberg for 24 hours straight, from noon on June 23rd to noon on the 24th.

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