RunThrough Trails Beat Box Hill October 2026

Box Hill in Surrey sets the challenge for this RunThrough Trails event: climb, descend, and maintain momentum over chalky terrain. The October race provides 21K, 31K, and 50K distances, allowing participants to choose from a long trail half-style effort to an ultramarathon. The 50K and 31K runners begin in the morning, with the 21K starting later. This event is designed for experienced trail runners, though confident first-timers are also welcome. The courses feature ridgelines, woodland trails, chalk ascents, and smooth singletrack, with sufficient elevation to demand careful pacing. Trail flags, tags, A5 arrows, and signage mark the routes, while marshals are stationed at key junctions to guide participants. RunThrough also supplies GPX files, useful for trail races where conditions like weather, walkers, or wildlife might affect course markings. The finish is located in an event village offering food, drinks, a themed medal, chip-timed results, complimentary race photos, post-race treats, and partner promotions; an event-logo T-shirt is also available for purchase during registration.