Greater London
Trail Running Calendar near Greater London 2026-2027
Explore the top trail runs near Greater London for 2026-2027! We've gathered 231 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
July 2027
A multi-format running festival at Blackland Farm on 24–25 July 2027 offering 24 hour and 12 hour solos, team relays, P24/P12 challenges, camping options, and finisher medals.
August 2027
Timed looped trail at Denbies Wine Estate offering distances from a single 5.3 km loop up to ultramarathon within a seven hour limit, flexible start window and medal options.
Riverside out and back races from Barnes along the Thames Path offering 10km, half marathon and marathon with marked course and checkpoint support.
London Backyard Ultra at Frylands Wood follows the Backyard Ultra format: run four miles each hour until one runner remains, scheduled for 28 August 2027.
10K and half marathon on the flat trail paths of Alexandra Gardens in Windsor on 29 August 2027 with chip timing, free photos and support for Brain Research UK.
Experience a scenic 10k trail run through Shoreham Woods in Kent featuring chip timing and a dedicated Canicross category for runners with dogs.
September 2027
A family-friendly muddy obstacle run in Brentwood, Essex offering 5 km and 1.5 km routes, on-course obstacles, finish-line facilities and an event village.
Flat riverside loops along the Thames in Walton on Thames on 4 September 2027 offering marathon and half marathon distances with medals for all finishers.
Trail Half Marathon and 10K across Wimbledon Common on 5 September 2027, chip timed with free photos, on-course water stations and event village facilities.
Guided 10 km trail run around Silent Pool near Guildford, following parts of the North Downs Way and Netley Heath as sunset or night group runs.
Multi-distance Thames Path event on 11/12 Sept 2027 with supported rest stops, GPS tracking, camping and finishers kit.
Trail half, 10K and a free 2 km kids run at Denbies Vineyard with wine stations, live music and a post-race party.
A 10 km trail run around Sandridge, St Albans, starting at Woodcock Hill on 12/09/2027 with entry listed at GBP 23.
Trail event on rough, undulating tracks across Ashtead Common with 10 km and 2 km options, raising funds for local charities.
October 2027
A fully marked 100 km trail ultramarathon around the Chiltern Hills from Chesham with GPS tracking, six checkpoints, a 19 hour limit and a 250 runner field.
Riverside out and back running event in Barnes along the Thames Path offering 10 km, half marathon and marathon distances with marshals and medical support.