Welwyn
Trail Running Calendar near Welwyn 2026-2027
Explore the top trail runs near Welwyn for 2026-2027! We've gathered 125 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
Three evening trail time trials in the Chilterns on 23 Sep, 21 Oct and 25 Nov 2026, each around 8 km, marked and chip timed with mandatory head torch.
A five mile trail run on 24 September 2026 at The Viper in Mill Green near Ingatestone. Limited to over 18s with a small field; participants must be self sufficient with phone and headtorch and a tail runner is on course.
A Backyard Ultra in Welwyn Garden City where runners repeat a 4.167 mile loop each hour until one remains; entry includes drink vouchers and a commemorative pint glass.
Rural chip timed 10k and 3k near Grantchester supporting Maggie’s and Addenbrooke’s Charitable Trust with medals, trophies and on site health services.
Timed multi lap event at Regatta Meadow in St Neots on a 5.3 km out and back course, offering distances from 5 km to ultra. Participants decide how many laps to run and all receive a finishers' medal.
October 2026
A 50 km Epping Forest event in London on 03 October 2026, listed as part of Camino Ultra’s 2026 events.
A 25 km EcoTrail event in Bell Common, Epping on 3 October 2026, listed as part of the 2026 events calendar.
A timed endurance event around King George’s Parks where participants run a 3.5 km loop every 30 minutes for up to 12 hours, either solo or in pairs.
A backyard ultra at Turvey House where runners complete a 4.167 mile (6.7 km) loop each hour; failing to start a loop on the hour means elimination. Entries include solo, paired teams alternating loops, and an 8 hour day cap.
Trail Half Marathon and 10K in Epping Forest, London on 10 October 2026 with marked routes, chip timing, eco measures, and limited parking.
Trail half marathon in the Chiltern Hills covering about 13 miles with grouped pacing, run leaders, a refreshment point, on site parking and a finisher medal.
An all-surface 25 km loop from Leyton with run leaders, a midway energy stop and post-run kit and community space at Portal HQ.
A scenic approximate 15 km trail race around Tring and the Ashridge Estate with marshals, water stations, team prizes and a finisher snood.
Timed, lapped run at Old Warden on 16 October 2026 with flexible start times, distances from one 3.28 mile lap to ultras and a seven hour limit.
A guided 10 miles through the Chilterns along canals, reservoirs and past Britain’s oldest post windmill, with trail instruction and a finisher’s medal included.
An off road cross country race of about 6 miles across Manor House Farm in Hardwick village with varied terrain and water crossings. Entries are limited to 300 runners and a minimum age of 17 applies.
A lap-based timed charity run in St Neots on a 5.3 km out and back course, held in partnership with a local school and the charity KiSS. Multiple distance options are available and Phoenix Running will donate five pounds from each entry to support Ki..