0 0 By 24 Hour Challenge In AnnouncementsPosted July 15, 201710-Time N24HC Rider, Clarence DoornbosWe regret to announce that 76-year-old Clarence Doornbos, of Caledonia, MI, who rode the N24HC 10 times between 1996 and 2008, was killed this morning while riding his bicycle. He was struck by [...] READ MORE