Trail Running calendar near Brentwood 2026-2027

A single lap undulating 10k trail race at Hadleigh Country Park with steep hills, deep mud, technical terrain and mandatory trail shoes.

A 10 km mixed-terrain run from Windsor & Eton Brewery along towpaths and parkland, with staggered starts, a pint cup and free drink at the finish, chip timing and downloadable race photos.

Guided 10 km trail run around Silent Pool near Guildford, following parts of the North Downs Way and Netley Heath forest. Sessions run at dusk or at night with headtorches in a led group and a recommended pace of about 10 min per mile.

A coastal trail event in Eastbourne featuring 10K, half, marathon and ultra courses with chalk and forest terrain and views of the Seven Sisters. It is part of the Endurancelife season leaderboard and uses online check-in with a safety vide..

Trail races of 10k and half marathon around Pitsford Water from Brixworth Country Park with marked routes, water stations and on course marshals. Entries have age limits, a four hour cut off and preordered parking and merchandise options.

Guided trail half marathon in the Chiltern Hills: about 13 miles with grouped pacing, a mid-route refreshment point and a finisher’s medal.

Two trail race distances, 25 km and 50 km, at Harrold-Odell Country Park in Bedford on 13 March 2027, organised by Thunder Races with early-bird and standard fees and instalment options.

Trail event at Hyde Hall Farm offering 10k, half, full and ultra distances with lap-based courses, water at the lap point, secure parking and a bespoke finisher medal. The event is cupless so bring a refillable cup or bottle.

A 24 hour endurance format at Alice Holt Forest where runners repeat a 6.7 km loop each hour, finishing laps within 60 minutes. Wooden medals are given to finishers and a wooden trophy is awarded to the overall champion.

TrailX Women Run is an all female trail event at Culden Faw Estate near Henley on Thames celebrating International Women’s Day, offering 3 km, 6.5 km and 13 km chip timed courses with medals, prizes and on site refreshments.

A quirky partner carrying race on a 380 m out and back course up The Nower in Dorking, with weigh in rules, helmets required and proceeds donated to a local food charity.

A hilly 13.1 miles out-and-back trail from Dorking to Leith Hill Tower with about 1,800 feet of ascent, water stations and marshals. Race HQ is The Priory School and entry includes a postrace cooked breakfast and a reusable medal.

A Kent LDWA challenge with three new West Kent routes, indoor checkpoints, limited entry and a 30 mile option with 4200 ft ascent and an 11 hour limit.

Twelve consecutive days of timed riverside running in Walton on Thames with multiple distance options, collectible daily lantern medals, finishers shirts, and a Double-Down option to run two half marathons each day.

A 50km trail ultramarathon through the Chilterns centered at Stonor Park, run as two 25km loops with 4000 ft of climb, five aid stations and full medical support. The event has a nine hour finish limit and medals for all finishers.

A trail running event at Stansted Park near Portsmouth offering three waymarked distances through woodland, open fields and past the historic Stansted House. Entries include chip timing, a metal finisher medal and on-course refreshments.

Looped races at Chalfont Park Sports Club and Chalfont St Peter Community Centre let runners choose distances from single 7K or 10K laps up to ultramarathons, with drop bag access, aid stations, crew support and on-site medical cover.

A London ultramarathon in the Lea Valley on 20 March 2027, listed on the Camino Ultra event calendar. The event is set in the E15 2HB area of London.

A PARAS'10 event in Friday Woods featuring a 3 mile loop with one to three laps, categories for runners, TAB entrants and canicross. A 2 mile junior race is available for ages 10 to 15.

A guided trail half marathon around the Surrey Hills, about 13 miles from St Martha's Hill in Guildford, following parts of the North Downs Way and notable viewpoints. The run is social in format with a guided pace and evening options.