Trail Running calendar near Welwyn 2026-2027

Experience the twilight beauty of Ardingly Reservoir during this midsummer evening run. Choose between a 5k or 10k distance on a scenic undulating trail featuring a fully stocked aid station and finisher medals for all.

Celebrate the longest day at the Summer Solstice Challenge around Abberton Reservoir, a timed loop with 5 km laps. Run as many laps as you like, earn a medal and support Essex Wildlife Trust.

A 21.2 km trail half marathon on the National Trust's Dunstable Downs on 21 June 2026, featuring 450 m of ascent, two on-route aid stations and fully marked trails with GPX support.

Run through the historic landscapes of Horsell Common where the Martians first landed in literature. This volunteer led charity event offers trail routes from 2 km to 21 km in a scenic Site of Special Scientific Interest.

Experience a multi terrain 10km run through the private Tusmore Estate. Enjoy scenic views and celebrate your finish at the Twisted Tree Brewery with a medal and a well earned drink.

Experience a community focused multi terrain race through the picturesque Kent countryside featuring 10k, 5k, and free junior distances followed by finish line treats and local hospitality.

Experience a circular cross country route through the undulating fields and woodlands of North West Hertfordshire. Choose between 26 and 18 mile courses starting from Baldock with panoramic countryside views.

Experience a scenic trail run through the woods and fields of Trent Country Park with chip timed races for seniors, juniors, and children.

Experience a flat 10k run starting from Shoreham along the scenic Downslink paths toward Bramber. This chip timed event features a halfway aid station and a unique finisher medal for all participants.

Experience an evening trail run at The Valley in Evesham featuring a two lap 10 km course through the country park. This pet friendly event offers a simple racing format with water stations and onsite facilities.

Experience an enchanting twilight trail run through the private 220 acre Ashburnham Place estate. Choose between 10k, 5k, or junior distances while supporting four mental health and bereavement charities.

Race two of the 2026 Trifarm trail series, this 10K summer run is over 95% off-road on public paths. Starting near a humpback bridge at Trifarm in Boreham, the anticlockwise course finishes with a lap around the lake.

Experience a scenic trail run through the Cowdray Estate and South Downs National Park featuring distance options for all ages including dog friendly categories and a stacking finisher medal.

Complete three races over three days to achieve a full marathon distance at the Colworth Estate. This multi terrain event in North Bedfordshire offers distances of 5 miles, 8.1 miles, and a half marathon.

Test your endurance at this last person standing event in Alfriston where participants run 4.2 mile loops every hour. Enjoy a scenic farm course with full support facilities and sustainable race practices.

Test your limits at World's Toughest Mudder, a premier 24 hour obstacle course challenge at Belvoir Castle. Compete individually or in a relay team to conquer 5 mile loops and elite obstacles for an entire day and night.

Experience an intimate trail run at the exclusive Hyde Hall Farm in Hertfordshire with lap based distances ranging from 5k to an Ultra Marathon. Enjoy a supported course with on site parking and a custom finishers medal.

Explore the scenic Surrey Hills and North Downs Way with five trail distances ranging from 5 km to a 52 km ultra. Run through ancient forests and rolling fields with punchy hills and fully marked courses.

Experience an off road adventure through the private Matterley Estate in the South Downs National Park. Choose between a 10km or half marathon distance on a well marked course featuring gravel tracks and woodland trails.

Experience a summer trail running event in the scenic Thames Valley with distances ranging from 5k to a half marathon. Enjoy well marked routes through the Marlow countryside featuring chip timing and a unique themed medal.