Trail Running calendar near Brentwood 2026-2027

A guided *10 km* group trail run at High Lodge in Thetford Forest on 19 July 2026, led at a conversational pace and organised into ability groups. Entry costs £12.50 and parking is charged at £4.

A 5.8 mile self navigation trail race near Littley Green on 22 July 2026, using a written route issued on the day with no course markings or GPX. Race HQ is at The Compasses pub with parking and a £4 drinks voucher included.

A single day entry in a 10 day series hosted by Zig Zag Running at Suffolk Running Centre, offering distances from 5k to ultra. Day one follows the Denham Flats route with parking included and on course aid at base camp.

Enjoy a 10k trail run through Chelmsford featuring a unique brewery checkpoint. This non competitive event includes mid race and finishers drinks along with a commemorative medal for all participants.

A 7 hour timed riverside challenge near Egham with flexible start options, themed medals from 3 km and goody bags for finishers. The signed course is mainly on paths and tarmac with aid stations each lap.

A Friday running event on a flat 5.3 km out-and-back riverside lap near Walton on Thames offering distances from 5 km to ultra and finishers' medals including spinning Rubber Ducky designs.

A 5k muddy obstacle course at Priory Park, Bedford on 25 July 2026, held in waves and aimed at participants aged 13 and over; the event lists toilets, refreshments and parking but is not suitable for wheelchairs or pushchairs.

City to Sea 2026 is a two-day running event in London on 25 and 26 July 2026 featuring an ultra marathon for individual age group entries. The start is at Station Approach SE1 8SW and the listed entry fee is USD 120.

Trail races of 12K, 25K and 50K start from Queen Elizabeth Country Park and follow sections of the South Downs Way with grassy tracks and chalk downland. Routes are waymarked and supported by marshals, aid stations and chip timing.

Bright Skies Surrey Hills is a daytime trail event at Denbies Wine Estate with marathon, half marathon, 10K and children's races. The marathon features a self navigation first half with checkpoints and a fully marked second half.

A circular half marathon trail run on the Ridgeway that visits Ashdown House and the original White Horse Hill. The route is described as undulating and the event is held under UK Athletics rules with a Trail Running Association permit.

Flat trail races at Summerleaze Park on 26 July 2026, offering 5K, 10K and a Half Marathon with marked routes, marshals, chip timing and post-race goodies.

A *7.5 km* trail loop around Westfield with over 80% off road terrain. Limited to 60 entrants, the event features a marked and marshalled course, prizes for first male and first female, and hall facilities including tea and cake.

A looped trail event from Guildford across the North Downs in Surrey offering 50 km, 25 km and 10 km options with covered rest stops, GPS tracking, medical support, camping and shuttle transfers, plus a finishers medal and t shirt.

MacTuffX London at Finsbury Park on 1 August 2026 combines ten Xercises with repeated runs in two distance formats. Solo, doubles and five-person relay entries are offered, with a LITE weight division and an 18 plus age requirement.

Third race of the Forest Five mile series on 1 August 2026, held as Orion Harriers' ELVIS fixture. The event awards individual and team trophies and offers a discounted series rate with age-category aggregate prizes.

Out and back marathon and a half marathon on part of the Vanguard Way near Croydon. Routes pass woodland, the North Downs and Greensand Ridge; the organiser provides race T shirts and post race goody bags.

A 10 mile multi terrain race through the South Downs National Park organised by Liss Runners volunteers. The route uses lanes, tracks and footpaths, includes mile markers and two water stations, and finishes at War Memorial Sports Ground wi..

A 49 mile point to point race along the Thames Path from Travelodge Oxford Abingdon Road to Henley on Thames, with three staffed checkpoints offering water and food. Finishers receive a bespoke medal and a choice of technical shirt mug or h..

A timed Friday run on a 5.3 km out and back towpath loop along the River Thames. The event is promoted as a ten pound charity entry for Rays of Sunshine and includes a double sided finisher medal.