Sunday, September 6, 2026 · Zandvoort, Netherlands
Distances
4.2 km
8.4 km
12.6 km
16.8 km
21 km
25.2 km
29.4 km
33.8 km
38 km
42.2 km
84.4 km
About this race
The Tikkende Klok Challenge supports research into the hereditary heart muscle disease PLN. Participants can complete any number of laps in the 'One Hour, One Lap' event. A Last Runner Standing challenge is available for competitive runners. All donations fund vital scientific research. Families are encouraged to participate.