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Trail Running Calendar near Chalfont Saint Giles 2026-2027

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Explore the top trail runs near Chalfont Saint Giles for 2026-2027! We've gathered 284 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

June 2027
A 50 mile loop ultra at Denbies Wine Estate in Dorking with a flatish one mile circuit, chip timing, several concurrent race options and up to 30 hours to finish.
Run one mile on the hour for 12 consecutive hours at Denbies Wine Estate with chip timing, a finisher medal, camping and a simultaneous virtual option.
A 21.2 km trail half marathon on the National Trust’s Dunstable Downs with hilly terrain, two aid stations, a 4 hour limit and fully marked navigation.
Timed event at Denbies Wine Estate on 20 June 2027 using a 1 mile loop; runners choose distances from 1 mile to ultra and run laps within a six hour limit.
A scenic point to point Half Marathon from Marlow to Windsor covering 13.1 miles of riverside trails and woodland paths with chip timing and baggage transfer.
A timed half marathon and 10K across Wimbledon Common with marked trails, on-course marshals, water stations and an event village at Richardson Evans Memorial Playing Fields.
A riverside 10 km evening run in north Milton Keynes featuring parkland trails, a canal tunnel crossing, canicross access, on-course water and chip timing.
A volunteer-run 145 mile towpath race from London to Bristol on 25 June 2027 with nine aid stations and a 45 hour cut off.
A ten-leg team relay along sections of The Ridgeway national trail covering the 86.5 mile route, organised by Marlborough Running Club with gender composition rules.
A four lap half marathon in Richmond Park on 27 June 2027, with chip timing, free photos, on course support and an event village.
A multi-terrain running event at Wrest Park with chip-timed 10K, a 5K that welcomes walkers, and age-group children's races across estate and farm tracks.
A women-only trail event in Surrey offering 50 km (no cut-offs), 25 km and 10 km routes from Denbies Wine Estate with signed routes and multiple aid stations.
July 2027
Off road half marathon along The Ridgeway near Wendover with a fully marked route, an aid station at Green Hailey passed twice, UTMB World Series index status and a 4 hour limit.
A 10 km trail race around Yattendon Estate at Renegade Brewery with chip timing, two water refill stations, a medal and a free pint or alternative drink at the finish.
A guided 10 km trail run across Thursley National Nature Reserve, on flat heathland and boardwalks, with sunset and night options, group pace guidance and a car park on site.
A trail ultramarathon on the Ridgeway on 10 and 11 July 2027 with 50km and 100km formats, signposted routes, pitstops and a finish at Avebury Standing Stones.
Pretty Muddy 5k at Fairlands Valley Park in Stevenage is a mixed-terrain obstacle course with muddy elements, staggered wave starts, on-site parking and event support.
Trail runs at Wendover Woods raising funds for the Chilterns Neuro Centre, with marked 10K and 5K routes plus an accessible 1.5K.
A community fundraising run in Beckenham Place Park offering 10k, 5k and 3k on mixed grass and paths with varied inclines.
A summer 10K in Highfield Park, St Albans with a free family fun run, event village and chip timed results on 18 July 2027.
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