Trail Running calendar near Harwell 2026-2027

Follow in the footsteps of ancient pilgrims on this 66 mile two day ultra adventure along the historic North Downs Way. Experience a supported winter trail challenge with overnight accommodation and full logistics included.

Run through the stunning Westonbirt Arboretum, home to over 2,500 tree species, on a solid surface perfect for a scenic race. Choose from 5 km or 10 km distances with multiple wave starts for this popular winter event.

Join this 5 km canicross adventure through the scenic woodland tracks of Irchester Country Park. This dog-friendly event features a staggered start, professional support, and finishers medals for both runners and their canine partners.

A 28.2 trail marathon along the River Adur in February, starting at Shoreham Sea Scout Hut, with muddy paths and fully stocked aid stations. Prior trail marathon experience, suitable clothing and a mobile phone are required.

Experience two distinct half marathons along the Hampshire coast over one weekend. Run the muddy trails of Langstone Harbour or the flat promenades of Southsea, with the option to complete both for a special bonus medal.

A measured 10 mile road race in Melksham with a route through Lacock, a finisher medal and prizes across age categories. The field is limited to 300 places and entries close on 1 January 2027 or earlier if full.

Multi-distance laps on the Flitch Way with 5.3 km loops, an aid station each lap and the chance to choose a bespoke medal from past events. The course is traffic-free on hard-packed trail and operates as a cupless event.

Choose your distance from 5k to Ultra on a tough off road course at Pengethley Manor. Experience vineyard trails with a seven hour time limit and unique medal options for individuals or pairs.

Experience a fully signed 50k trail ultra along the scenic North Downs Way and ancient woodlands of Norbury Park. Starting near Dorking this accessible route features four well stocked checkpoints and a finisher medal.

Run through the longest underground tunnels in the UK on a historic railway path in Bath. This event offers distances from 500m to an ultra marathon with both flat and hilly route options for all participants.

An annual 12 mile trail race around the Vale of Pewsey organised by Pewsey Vale Running Club, listed in Worlds Ultimate Running Races. Proceeds from the Terminator have helped the club donate over £101,000 to local charities.

BigMud Trails (EARTH) is a single lap trail event at Queen Elizabeth Country Park offering 16 mile, marathon and 50K options through the Meon Valley and South Downs. Aid stations provide food and PH 1000 electrolyte and the event is cupless..

A 42 miles trail ultramarathon along the historic St Peter's Way from Chipping Ongar to the chapel at Bradwell on Sea. The waymarked route needs basic navigation, includes four outdoor checkpoints and enforces compulsory safety kit.

A 10 km multi terrain race from Windsor & Eton Brewery along Baths Island and Thames towpaths. The course is about half off road and the finish includes a pint cup and a free drink.

Experience a muddy winter adventure on the Community Forest Path around Bristol. Choose between 30 and 45 mile distances featuring chip timing, dedicated pacers, and well stocked checkpoints.

The The Winter Green Man Ultra will take place in Bristol on Saturday 6 March 2027. You can run between 48 and 45 miles.

Explore the scenic Northamptonshire countryside with 10k and Half Marathon trail races at Pitsford Water. Enjoy fully marshaled routes through local villages and alongside the water with professional on course support.

The Imber Ultra is an annual trail run of just over 33 miles organised by Avon Valley Runners and the Rotary Club of Westbury, with route details, checkpoints, results and photos provided by the organisers.

Wight Riot is a mixed terrain out and back event on the Milford on Sea coastal path with views of the Isle of Wight. Runners choose distances from 5K up to ultra marathon, with aid stations each lap and medals for one lap or more.

Harrold Odell hosts fully marked, fully supported trail races on 13 March 2027 in 25 km and 50 km distances. Generous cut-offs and runnable terrain aim to reduce navigation and pacing concerns for participants.