Welwyn
Trail Running Calendar near Welwyn 2026-2027
Explore the top trail runs near Welwyn for 2026-2027! We've gathered 129 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
June 2027
A Star Wars 50th Anniversary weekend on 5 and 6 June 2027 at Caldecotte, Milton Keynes featuring marathon and half marathon races around Caldecotte Lake, unique finisher medals, on-course water and toilets, and time limits for each race.
Pretty Muddy 5k at Willen Lake is a 5 km obstacle course with mud features, staggered wave starts and a minimum £50 fundraising target for Cancer Research UK.
Two supported trail runs in London: a 55 km ultra and a 25 km route on the Capital Ring with signed routes, feed stations, chip timing and finish refreshments.
A point-to-point trail event through the Hertfordshire AONB offering marathon, half and 10 km distances open to both runners and cyclists with separate results and medals.
Trail running event at Wendover Woods featuring a Half Marathon, 10k, new 5k and junior run on hilly forest trails with maps, medals and on-site facilities.
A 10 km out-and-back race through gravel paths and woodland at Weald Country Park in Brentwood, organised by MCC Promotions. The event includes on-day registration, water stations, prizes and supports the charity Sport In Mind.
Urban 100 km ultramarathon in central London with 100 km, 50 km and 25 km routes that pass 100+ city landmarks and include staffed checkpoints.
A muddy 5k obstacle course at Cassiobury Park where participants climb, crawl and slide through timed waves while raising funds for cancer research.
A 24 hour event near Caldecotte Lake where individuals or teams of two to six complete as many 6.55 mile laps as they choose, with camping and on site facilities.
A scenic trail half marathon at Dunstable Downs, 21.2 km with 450 m ascent, marked route, two aid stations and a 4 hour time limit.
A ten-leg team relay along sections of The Ridgeway national trail covering the 86.5 mile route, organised by Marlborough Running Club with gender composition rules.
July 2027
An 82 mile point-to-point ultramarathon from Epping to Harwich along mixed trail and road, with checkpoints, GPS tracking, a race medical team and a 24 hour cut-off.
A muddy 5km obstacle run at Wild Forest in Brentwood on 3 July supporting Essex Wildlife Trust, with safety teams, parking, showers and a medal for each participant.
A 21.1 km off road trail half marathon on The Ridgeway in Buckinghamshire with undulating terrain, two aid station visits and UTMB World Series index status.
A 24 hour multi terrain relay or solo race at Albyns Farm with teams of two to eight running repeated 5.75 mile laps and onsite camping and facilities.
A muddy 5k obstacle course at Fairlands Valley Park in Stevenage with staggered waves, on-site facilities, a minimum fundraising target of £50 and age 13 and over requirement.