Kald Kletske Klinkerkoers is a cycling event in Dokkum, Friesland, using Brouwerij Dockum as its hub. Participants ride on Frisian roads and through Dokkum's streets, with cobbled sections adding to the challenge. Route lengths vary from 35 and 50 km to 105 and 150 km, catering to those seeking a brisk ride or a full day's cycling.
The course centers on Dokkum and its klinkers, Dutch cobblestones that make the ride demanding. Mountain bikers have marked routes on unpaved roads and paths, with past options of 50 and 90 km. Approximately 350 riders have participated in recent years, and younger cyclists can join a Dikke Banden Race. Following the rides, the event embraces its brewery location with music, cycling tales, and a beer from Brouwerij Dockum.