100 Mile Grand Slam 2027

The Centurion 100 Mile Grand Slam, set for 2027, is an epic journey through some of Britain's most stunning landscapes. This grand challenge comprises four back-to-back ultra-marathons that test both the physical and mental limits of runners.
Thames Path 100: The adventure begins on May 1st-2nd with the Thames Path 100, where participants will navigate through London’s historic riverside paths. Running along the picturesque banks of the River Thames, this event offers a unique blend of urban and rural scenery as runners pass by iconic landmarks such as Tower Bridge and Kew Gardens.
South Downs Way 100: Next up is the South Downs Way 100 on June 12th-13th. This leg takes place in the rolling hills of Sussex, offering a challenging course through England’s first national park. The route winds its way along ancient trails and paths that have been used by generations of walkers and runners alike.
North Downs Way 100: In early August (July 7th-8th), participants will tackle the North Downs Way 100, which traverses through Kent’s scenic countryside. This race features a mix of woodland tracks, open fields, and challenging climbs that test endurance as much as they reward with breathtaking views.
Autumn 100: The final leg arrives in October (October 16th-17th) with the Autumn 100. Set against the backdrop of autumnal hues, this race through Surrey's North Downs offers a serene and picturesque setting for the concluding event. As runners make their way along historic paths and trails, they will be rewarded with stunning vistas that highlight the beauty of British countryside in its most colorful season.
Each event is designed to challenge participants not only physically but also mentally, pushing them beyond what they thought possible while celebrating the rich history and natural beauty of Britain’s landscapes. To provide peace of mind for those who might face unexpected challenges leading up to race day, XCover insurance is available as an option, allowing runners to secure a refund should circumstances prevent their participation.
This event promises not just a series of races but an unforgettable adventure through some of the most beautiful and historic regions in England.