Trail Running calendar near Welwyn 2025-2026

We have found 415 Trailruns within 80 miles of Welwyn. See below where and when you can find the races.

Join a guided 16k trail run at High Lodge Thetford Forest on 8 February 2026, following scenic woodland tracks and gentle hills. Run at a conversational pace with groups, enjoy trail tips from guides, and soak up the forest atmosphere.

XTERRA Matterley is a weekend of off road racing at Matterley Basin, Hampshire, with duathlons and trail runs from 7K to half marathon. Expect varied terrain, family activities and a chance to qualify for the XTERRA Trail Run World Champion..

Celebrate Valentine's Day with riverside laps along the scenic Thames at Xcel SPORTS HUB. Choose 5k to ultra, run as many laps as you like within a one hour start window and 7 hour limit, and earn a bespoke finisher medal.

Run the traffic free Flitch Way on two 5.3 km marked loops, choosing distances from 5K to marathon or a timed 6 hour challenge. Pick a bespoke medal and enjoy lap aid station support at this cupless event so bring your own cup.

The Phoenix Running - Greater London will take place in Greater London on Sunday 15 February 2026. You can run between 3 and 28 miles.

The Phoenix Running - Southwater will take place in Southwater on Sunday 15 February 2026. You can run between 5 and 42 kilometers.

Run the Thames in winter at Magna Carta Winter on 21 February 2026 in Runnymede, Surrey. Choose 10K, half or marathon on a scenic out and back course praised by Runners World, with chip timing and bespoke medals.

Running Tribe Races in Chalfont St Peter offer looped 7 km or 10 km courses with choices on the day from 7k up to ultras. Enjoy scenic trails through woodland, a staffed hub for support, and welcoming pacers.

Join Any Kind of Weather Runner at Northampton Active on 21 February 2026 for a six hour challenge where you can tackle distances from 5k up to ultra. Finishers receive a medal and goody bag and aid stations on each lap will keep you fueled..

Take on the scenic 42 mile St Peters Way Ultra from Chipping Ongar to the St Peter on the Wall chapel at Bradwell on Sea, finishing along a raised sea wall. Expect muddy, changeable terrain with checkpoint support and live tracking.

BigMud Trails EARTH kicks off the Classic Element Trail Series at Queen Elizabeth Country Park, guiding runners through the Meon Valley and South Downs with two ascents of Butser Hill. Options: 16 miles, marathon or 50 km on muddy trails.

Join the Hadleigh Legacy 10k at Hadleigh Country Park on 22 Feb 2026 for a scenic yet testing single lap trail with hills, mud and fields. Expect a bespoke medal, free photos and competitive wave starts.

Run scenic loops at Thetford Festival of Running on 22 Feb 2026 in Thetford Forest, with distances from 5k to ultra and a friendly cap of 300 runners. Enjoy on course refills and post run tea while 20% of fees help care for the woodland.

Join the Winter Trail Run at Gatton Park on 22 February 2026 for scenic multi terrain 5K and 10K loops, plus a Canicross category. Expect a finisher medal, bag drop and refreshments, with prebooked parking helping to support Gatton Trust.

Run the North Downs Ridge 50k, a scenic trail ultra from Denbies Wine Estate near Dorking. Enjoy rolling Surrey countryside, four aid stations, medical cover and a UTMB qualifier for runners after a classic long day on trails.

Join Dirt Run, a two round multi terrain series in Northamptonshire offering 5 km to 15 km options at Irchester Country Park on 18 Jan and Brigstock Country Park on 22 Feb. Expect trails, a notable hill and a custom finisher medal.

Take on The Terminator in Pewsey: a tough 12 mile off road race expected to be muddy with several climbs and a steep finish. Enjoy chip timing, full medical cover and a unique finisher T shirt.

Join a guided 10 km trail run through Thursley National Nature Reserve, across open heath, pine wood and the boardwalk voted Britain's Favourite Path. Enjoy a friendly group pace with dusk and headtorch evenings, kit trials and a possible p..

Join the G3 Series at Newlands Corner, Guildford on Saturday 28 February 2026 for scenic 10 km and 15 km runs through Surrey countryside. Single entries and series bundles are available; register by 26 February.

Join a guided 30 mile South Downs Way ultra from Harting Down, ideal for first time ultra runners looking for a friendly, non competitive challenge. Savour rolling chalk hills, ancient yews at Kingley Vale and expert guided coaching along t..