Trail Running calendar near Harwell 2025-2026

Test your limits on the Winter Downs 200, a continuous 200 mile trail loop through southern England from Dec 10 to 14 2025. Expect big climbs, rugged trails and a 96 hour cutoff for a bold end of year challenge.

Take on the 5 Golden Rings Run on 11 Dec 2025 at Pengethley Manor near Ross on Wye for a tough off road course through vineyards with a climb on every lap. Distances from 5k to ultra, walk or run, or join virtually for a verified medal.

Brave the 6 Geese a laying Run on 12 December 2025 at Pengethley Manor, Ross on Wye. Choose 5k, 10k, half, marathon or ultra across a very tough off road course with a hill each lap and scenic vineyard views. Walkers welcome.

Take on 7 Swans a Swimming at Pengethley Manor: complete your chosen distance in 7 hours on a 2.5 km off road lap that climbs and winds through vineyards. Walkers and runners welcome and a flexible virtual option is available worldwide.

The Salcey Forest Christmas 10K, 5K & Junior Fun Run is a festive trail running event held in Salcey Forest, Northamptonshire. Set amidst beautiful, tree-lined woodland paths, the race offers a virtually flat, mixed-terrain course that can..

Mince Pi Run - races of 2 decimal places is a 14 December 2025 off-road event at Shalford Park, Guildford. Participants choose from 3.14 to 31.4 miles (1–10 laps) on a scenic, mostly flat course with one or two hills. A Pi marathon option a..

Join 8 Maids a Milking on 14 Dec at Pengethley Manor, Ross on Wye for a festive offroad run through vineyards and rolling hills. Choose 5k to ultra and finish within a friendly 7 hour limit; walkers and runners welcome.

Take on the 12 Drummers Drumming Run at Pengethley Manor, an off road loop through vineyards and manor grounds with tough hills. Distances from 5k to ultra welcome runners and walkers, with virtual entries and medals available.

Join the festive Gaddesby Gallop on 20 December 2025 for a spirited village run and a warm post race gathering at Gaddesby village hall. Entries are online only and race numbers are collected at the hall on race day. Dogs are not permitted.

Join a festive 12 km trail in Chelmsford for a fun, social run with a brewery checkpoint en route. Entry includes a Santa hat, drink tokens, a Christmas medal and post run pints or upgrade to rum at the finish.

Join the Soup Run for a friendly 6 mile multi terrain trail around Bembridge, ideal for a social Sunday run with hilly coastal scenery. Finish with a warming soup and roll, a souvenir and community vibes, so book early.

Run the Slow and Dirty, a festive 19 km level trail along a restored Somerset and Dorset railway starting in Sturminster Newton. Family oriented event welcomes dogs and buggies, with a medal, mince pie and mulled wine.

The Die Hard Christmas Marathon and Half Marathon is a festive running event taking place on December 24, 2025, at Caldecotte Lake in Milton Keynes. Participants can choose between a full marathon, consisting of 7.5 scenic laps, or a half m..

Join the Santa Claws 10km, a festive winter multi terrain cross country run at Renegade Brewery on the Yattendon Estate on 24 December. Expect muddier trails than the summer event, a canicross option and a finisher medal plus a beer or alco..

Take on a scenic 10 mile cross country through Hainault Forest with Ilford Athletic Club, three undulating laps across tracks and grass. Friendly club atmosphere, limited entries and post race prizes make it a rewarding winter challenge.

Tackle an undulating winter cross country on Sunday 28 December 2025 at Acresford Sand and Gravel in Huncote, featuring Croft Hill and a stream for a scenic but testing 10K. Junior one and two lap races share the same start and finish.

Winter X near Meonstoke on 28 Dec offers 10, 30, 50 and 70 km trail routes along the South Downs Way. Enjoy marked courses, checkpoints, chip timing, an event tee and post run food.

Take on Plain Crazy Winter, a 12.5 mile road and trail challenge on 29 December with hilly, scenic and wintry terrain and a bespoke finisher medal. The race supports the Royal British Legion and entries are limited, so book early.

Join the Darklink Lightlink 10 km in Shoreham on 29 December for a flat headtorch run along the Downslink to Bramber and back. Mandatory headtorches, chip timing and a finisher medal add post holiday sparkle.

Finish the year with the River Thames Run, a six hour timed challenge along a flat, scenic out and back route beside the Thames. Choose a 3.28 mile lap, 5k, 10k or go further up to ultramarathon distance while enjoying club facilities.