Trail Running calendar near Hertfordshire 2026-2027

Enjoy a flexible timed running event along the flat River Thames towpath. Choose your distance from 5km to an ultra marathon and earn a bespoke spinning medal on this fast riverside course.

Guided 10 km trail run in the Chiltern Hills from Church Farm Cafe, Aldbury, with Run Leaders offering trail tips and local history. Groups are matched by ability, dog friendly with cani cross equipment.

MacTuffX Peterborough on 11 July 2026 is a functional fitness race at the Embankment with solo, doubles and five-person relay formats, ten Xercises and repeated running segments. Entrants must be 18 or older.

A lap based timed run at Mowsbury Park on 11 July 2026 offering distances from 5 km up to ultra with a flexible one hour start window and a choice of medal or lower cost no medal entry. Places are limited to 75.

A muddy 5k obstacle course through Abington Park in Northampton on 11 July 2026, organised by Cancer Research UK. Waves run every 15 minutes, participants must be aged 13 or older, and on site facilities include toilets and refreshments.

A muddy 5k obstacle event at Beckenham Place Park with climbing, crawling and sliding on a grassy, undulating course. Waves start every 15 minutes; participants must be 13 or older and fundraising supports Cancer Research UK.

A muddy 5K obstacle event in Brentwood on 11 July 2026 featuring climbs, water crossings and a 20 foot slide into a lake. Open to ages 13 and over, with a £40 registration fee and a £100 fundraising pledge.

Multi-distance lap races at Bawsey Country Park from 5k to ultra marathon on sand, gravel and grass. Aid stations are available every lap and parking is included.

A multi-lap running event at Box End Park in Kempston with three race options of repeated 5 km laps, race medals, on-course support and awards across overall, female and age-group categories.

A guided 18 mile trail run on 12 July 2026 along the Kett’s Country Long Distance Trail, starting in Wymondham and finishing just past Cringleford’s historic twin arched bridge. The event emphasises history, nature and wildlife.

A 7-mile multi-terrain race through Knole Park with a chip-timed 3.5 km junior run for ages 9 to 15. Profits support The Running Charity and the event includes medals, free photos and prizes for top finishers.

Community fundraising runs at Abington Park with chip timing and a mixed pathways and grass course. Distances include 10 km, 5 km and 3 km and participants have a minimum fundraising target of £50.

A weekend trail running festival at Mill Farm, Lurgashall, featuring 50 km, marathon, 16 mi, 12 km and a 2 km LittleFeet run, with camping, glamping, on-site village activities and stocked aid stations including PH1000 electrolyte.

Trail runs of 10K, 5K and a 1.5K accessible loop take place at Wendover Woods on 18 July 2026. Proceeds support the Chilterns Neuro Centre and the courses are fully marked and marshalled.

A 24 hour trail running and camping weekend on the Shotley peninsula with a fully marked 4.3 mile coastal lap. Entries are available for solo runners, pairs or teams up to six and camping at race HQ is included in the entry.

A weekend running festival at Blackland Farm on 18–19 July 2026 offering 1-mile lap formats: 24-hour and 12-hour solos, team relays, plus P24 and P12 paced challenges. Off-road course, camping included and limited Bell Tent upgrades.

MacTuffX Brighton on 18 July 2026 at Withdean Stadium combines ten structured Xercises with repeated runs in solo, doubles and five person relay formats and includes a LITE weight category.

Pretty Muddy 5k at Tilgate Park in Crawley is an obstacle course around Tilgate Lake with climbs, crawls and slides. The event raises funds for Cancer Research UK and offers on-site toilets, refreshments and parking.

A muddy 5k obstacle course at Stoke Park in Guildford on 18 July 2026 with staggered wave starts. Entry fees and a minimum fundraising target apply; participants must be 13 or older.

A vineyard run and walk at Denbies Wine Estate near Dorking with trails across the North Downs, followed by stone baked pizza and a Denbies wine tasting. Trail shoes recommended and free parking is available at the estate.