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Trail Running Calendar near Marlow 2026-2027

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Explore the top trail runs near Marlow for 2026-2027! We've gathered 233 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

October 2026
Guided 30-mile trail run on the North Downs Way from St Martha's Hill to Box Hill with coach support, group pacing, and nearby transport; entry £55.
A 50 km running event in Epping Forest, London on 3 October 2026, listed at Capel Rd, E12 5DB.
A guided 30 mile trail run from St Martha's Hill exploring the Surrey Hills and Box Hill with an experienced ultra runner and coach. Group pace, recommended 22 miles training, cost £55 and an alcohol free beer may be available.
An inflatable obstacle course event at Kempton Park Racecourse on 3 October 2026 with 2.5K, 5K, 10K and 15K options for ages 5 and up.
A timed endurance event around King George’s Parks where participants run a 3.5 km loop every 30 minutes for up to 12 hours, either solo or in pairs.
Scenic out and back races along the Thames Path from Petersham & Ham Sea Scouts HQ to Barnes, offered as 10 km, half marathon and marathon options with staffed checkpoints and medical cover.
Thames Valley LDWA challenge walk in Marlow on 4 October 2026 offering 25 km, 40 km and 50 km routes with checkpoints, mandatory kit and entry limits.
A 7 hour Time Challenge along the River Thames with flexible distances from a 3 km minimum up to ultra and 50 km options. Finishers choose a medal from past events and have access to aid stations and a goody bag.
Half marathon and 10 km races at RAF Greenham Common in Thatcham, Berkshire. The traffic free, flat course has water stations, free parking and a children's race paid on the day for £5; proceeds support New Life Special Care Babies.
A lap based Friday timed run on the Thames towpath offering distances from a single 3.28 mile lap up to ultra distances, with the ten pound charity entry supporting Rays of Sunshine and a special double sided medal.
Trail half marathon in the Chiltern Hills covering about 13 miles with grouped pacing, run leaders, a refreshment point, on site parking and a finisher medal.
Trail running in Hurtwood Forest near Guildford with 15 km and 21 km routes, on-site facilities, water stations and medals for all.
A non-competitive, all-surface 25 km loop from Leyton with run leaders, a halfway energy stop, kit demos and community-focused proceeds for Hackney Foodbank.
A mixed-terrain 10 km and 5 km race around Frieth in the Chiltern Hills featuring woodland paths, country roads and notable climbs.
Community-supported trail runs at Old Basing offering 10K and 6K chip timed races plus a 2K fun run to raise funds for local schools.
Flat mixed trail races along the Basingstoke Canal and through Wellesley Woodlands with 10 km, 5 km and a 2 km fun run, chip timing and a collectable medal.
A scenic approximately 15 km trail race in Tring on 11 October 2026, running through Ashridge Estate and the Ridgeway with marshals, water stations and post-race facilities.
A lap-based out and back run along the Thames in Walton on Thames offering distances from a single 5.3 km lap up to ultra distances with a seven hour limit.
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