Trail Running calendar near Hertfordshire 2026-2027

Experience a weekend of trail running in the Cotswolds with distances ranging from a 10K to a 100KM ultra marathon. Starting from Ilmington these UKA regulated races now include a new 50K option for all participants.

Trail races across the South Downs from Lancing Manor Leisure Centre on Sunday 3rd May 2026. Choices include marathon, half marathon and a 5 mile trail run with aid stations and course marshals.

Experience a guided group trail run through the Surrey Hills designed to reach 1000m of elevation. This non competitive 12.5 mile journey features technical climbs and woodland trails led by an experienced mountain leader.

Experience the beauty of the North Wessex Downs with trail races of 20 or 33 miles. Run through historic sites like Avebury and the rolling Wiltshire countryside on courses designed for trail enthusiasts.

Enjoy a guided 5km trail run through the Chiltern Hills followed by a specialized movement class. This event includes expert run leaders, trail technique instruction, and basic facilities at Church Farm Cafe.

A friendly trail run on Headley Heath near Leatherhead with a two lap 10 km route through open and woodland paths. The undulating course has a small hill on each lap and offers scenic views and bluebells.

A 23-mile stage relay along the Roach Valley Way run by teams of four, where teams navigate using maps and way markers. The event raises funds for Havens Hospices and awards team prizes and medals to finishers.

A guided **10 km** group trail run at High Lodge in Thetford Forest, led at a conversational pace and organised by ESCAPE trails. Mostly flat woodland trails on mixed surfaces, with a participant fee and parking charge.

A trail festival in Winchester on 4 May 2026 offering four distances from 14 miles to a 50K ultramarathon, fully marked routes, aid stations and parking at Winchester Rugby Club.

Take on the Freddo Mercury Rhapsody Run along a flat riverside towpath at Xcel SPORTS HUB, logging as many 5.3 km laps as you can within a relaxed 7 hour limit. Rock up in a 1.5 hour start window or request a time, with aid stations and opt..

Spring trail races in Harewood Forest featuring 5k, 10k, canicross and a children's fun run on undulating forest and field routes. Pre-registration only; proceeds support local playing fields and school PTA.

Kick off the championship series with this 15k spring trail run in Boreham. Enjoy a scenic route consisting of 95% off road paths through footpaths and bridleways with on site amenities and optional swim access.

A six-hour timed trail event at Beacon Hill Country Park on 8 May 2026. Run as many 3.3 mile laps as desired; a marathon equals eight laps and a half marathon four laps. Head torches are required for laps started after dark.

A 100 kilometre trail ultramarathon in the Chiltern Hills on 9 May 2026, following an anticlockwise loop past Ashridge, Coombe Hill and Whiteleaf. The fully marked route has open GPS tracking, six checkpoints and a 250 runner limit.

A point-to-point 50k from Christ's Hospital School to Brighton over mixed trails and roads, with a flat first half, hilly middle on the South Downs and a downhill finish to the seafront. Four aid stations, full course signage and a bespoke..

Off road half marathon and 10 km near Ludgershall, running through woodland and bridleway trails. The event is chip timed and features stocked aid stations, medical support and finisher medals.

A weekend trail running festival at Deene Park Estate near Corby on 9 and 10 May 2026 featuring 10k, 21.1k and 25k challenges plus a combined 56.1k Quest and festival activities.

Experience a variety of trail running and walking events at Mapledurham near Reading. Choose between ultra distances, half marathons, or a six mile walk featuring a river boat crossing with on site camping available.

An inflatable obstacle course in Guildford, Surrey on Saturday 9 May 2026 covering 5 km. The organiser says the 2026 edition is bigger and bouncier, and recent bookings include 64 in the past 24 hours.

A linear 40 miles walk along the ancient Ridgeway from Avebury to Streatley, crossing Wiltshire, Oxfordshire and Berkshire and passing prehistoric sites. The event uses mapped routes, staffed checkpoints with refreshments, and awards a comp..