Windsor Trail Run Half Marathon & 10K August 2026

The Windsor Trail Run Half Marathon & 10K in August guides participants along the paths of Alexandra Gardens in Windsor, Berkshire, with Windsor Castle in view. Two races are available: a 10K that begins in the morning, followed shortly by a half marathon. This setup accommodates both those seeking a shorter trail run and individuals prepared for 13.1 miles. The course is flat, utilizing park paths instead of challenging terrain. This design makes it accessible for less experienced runners, while still providing a fast, consistent route for seasoned athletes. The location is a key feature: Alexandra Gardens places the race near the Thames-side center of Windsor, and the castle's presence lends the event a unique local character.