Trail Running calendar near Harwell 2025-2026

The Black Mountains 50 is a challenging ultra running event held at Longtown Village Hall, Herefordshire, serving as a gateway to the Black Mountains. Scheduled for July 11, 2026, it features four distances: 50-mile and 32-mile ultras, a marathon, and a half marathon. All courses require self-naviga..

The MTC Severn Way Ultra is a 57-mile point-to-point ultra marathon held in the UK, starting at Travelodge Worcester and finishing at Travelodge Stonehouse. The course follows the Severn Way, passing through towns including Upton-on-Severn, Tewkesbury, Gloucester, Epney, Priding, and Frampton-on-Sev..

The Maidenhead Trail Run, taking place on July 26, 2026, offers a scenic and relaxed running experience in Summerleaze Park, Maidenhead, UK. Participants can choose from 5K, 10K, and Half Marathon distances, all featuring flat, soft trail terrain suitable for all levels, from beginners to seasoned t..

The Black Bull 15 Trail Runs, held in Chelmsford, offer two main distances: a competitive 15-mile trail run and a 15km trail run/jog/walk suitable for all levels. The event takes place on varied trail surfaces, providing a scenic experience where participants might spot local wildlife like deer and..

The Windsor Trail Run, held on August 30, 2026, takes place in the scenic Alexandra Gardens, Windsor, UK, with views of Windsor Castle. This event offers two race distances: a 10K and a Half Marathon, both featuring flat, trail terrain with minimal elevation (29m for 10K and 58m for Half Marathon),..

The Henley River Half Marathon, 10k & Junior Race takes place at Temple Island Meadows, Remenham Lane, Henley-on-Thames, UK. Scheduled for September 5, 2026, this event features a half marathon, 10k, and a junior race for under-11s. The course offers fast, undulating mixed terrain trails alongside t..

The South Downs 100 mile (Autumn Event) is a challenging single-loop trail race held in the scenic South Downs National Park, starting at Plumpton Racecourse in Lewes, East Sussex. Covering 100 miles with over 12,000 feet of elevation, the course features rolling hills and stunning views, supported..

The Windsor Trail Run, taking place on November 8, 2026, is a scenic trail running event set in Alexandra Gardens, Windsor, Berkshire. Offering both 10K and half marathon distances, the course features flat, off-road trails with gentle elevation gains (29m for 10K and 58m for half marathon), ideal f..