50 Mile Grand Slam
Worthing, United Kingdom • 11 Apr 2026
Centurion Running’s 50 Mile Grand Slam 2026 is a four-race ultramarathon series, consisting of four 50-mile events on famed UK trails: South Downs Way 50 (11 Apr), North Downs Way 50 (16 May), Chiltern Wonderland 50 (19 Sep), and Wendover Woods 50 (14 Nov). The four races are grouped as All Four 2026 50 Mile Events, with entry managed through SiEntries. Organised by Centurion Running, the Grand Slam invites participants to complete all four 50-mile routes. An optional XCover refund option is available to cover unforeseen absences. These events showcase trail ultrarunning across England's varied landscapes. Visit the organization's website for the most recent information.