Trail Running calendar near Slinfold 2026-2027

A Pretty Muddy 5k obstacle event at Royal Windsor Racecourse on 30 May 2026, featuring muddy obstacles to climb, crawl and slide. Participants must be 13 or older; there is a minimum fundraising target and on-site support and facilities.

Timed 4.2 mile (6.7 km) laps run on the hour at Redbridge Cycling Centre on a 2 km tarmac loop. Competitors must finish each lap within the hour and the last runner standing is declared the winner.

The Otmoor Challenge will take place in Horton-cum-Studley on Saturday 30 May 2026. You can run between 10 and 21 kilometers.

A track running event at Wodson Park on 31 May 2026 with distances from 5k to a six hour challenge. Chip timing, aid stations, a bespoke medal and limited entries are provided.

Races at Southampton Common include Half Marathon, 10k, 5k and a junior race on a multi-lap course through woodland, wetlands and parkland, with kilometre markers, marshals and an event village offering food and partner giveaways.

A point to point 50 km ultramarathon on 31 May 2026 from Peckham in London to East Peckham in Kent. The route moves from urban streets into rural lanes and includes aid stations, volunteers and clear course marking.

Charity 3k and 5k runs at Dunorlan Park on 31 May 2026, for ages 16 and over; mixed-terrain course with lakeside start and basic onsite facilities.

A guided 13-mile trail half marathon around the Surrey Hills, starting and finishing in Guildford, with routes that include St Martha's Church, Shere, Newlands Corner and parts of the North Downs Way. Group run format, not a race, cost £25.

A timed riverside event on a 5.3 km out and back Thames course where runners choose how many laps to complete within a seven hour limit. Ten pound entry supports the Rays of Sunshine charity and a double sided medal is awarded.

The Sundowner Trail Marathon on 6 June 2026 is an evening 27 mile trail through saltmarsh, canal towpaths, vineyards and forests. Limited to 50 runners, this intimate race offers checkpoints, a finish memento and a bespoke local beer.

A 24-hour relay at Wasing Park, Reading on 6–7 June 2026 with Solo, Pair, and Team entries on an 8 km trail lap, event camping and an event village, plus charity entry options and tiered team pricing.

A sold out Backyard Ultra at Chilton Manor Farm near Chilton Candover, Hampshire. Runners repeat a 4.16666 mile loop each hour until the last runner completes a lap.

Run laps through Denbies Wine Estate in the Fire Horse Run, a timed off road challenge on an undulating 5.3 km loop with distances from 5 km to ultra. Pick as many laps as you like within a seven hour window for a flexible, scenic race day.

Experience the beauty of Ardingly Reservoir during this relaxed midsummer sunset run. Choose between a 5K or 10K distance on an undulating trail course featuring scenic water views and a fully stocked aid station.

A three-race Forest Five (mile) series at Jubilee Retreat on 6 June, 4 July and 1 August 2026, with single-race and discounted series entry, age-category aggregate trophies and a third-race ELVIS fixture with team prizes.

A community 5k obstacle event at Cassiobury Park where participants climb, crawl and slide around a largely flat, mixed terrain course. Waves run every 15 minutes and the event supports Cancer Research UK fundraising.

A 5k obstacle run at Willen Lake, Milton Keynes, part of Cancer Research UK’s Race for Life. Staggered wave starts, a minimum age of 13, on-site facilities and event accessibility support are provided.

An obstacle 5k through Prospect Park, Reading on Saturday 06 Jun 2026, featuring climbing, crawling and sliding across grass, slopes and woodland. The event lists entry fees, a minimum fundraising target and on-site facilities plus a finish..

The Wychwood Fun Run will take place in Fifield on Saturday 6 June 2026. You can run between 5 and 8 kilometers.

BigSea Trails (WATER) is the water-themed event on the Isle of Purbeck, with single-lap coastal and hill routes from Knoll Beach. Four distances run to landmarks such as Corfe Castle and Old Harry Rocks with stocked aid stations and mandato..