Trail Running calendar near Gloucester 2025-2026

The Westonbirt Arboretum Winter Day Race is a scenic running event set in the stunning National Arboretum, featuring over 2,500 tree species. Participants can choose between a 5km or 10km race, with routes that showcase the beauty and diversity of the arboretum's landscape. The event is designed to..

Trails & Tarmac Backyard Ultra – Winter takes place near Crickhowell in Powys, Wales, inside the Black Mountains. The course uses a 4.167-mile loop, a 50/50 mix of trail and tarmac, with one gradual climb and a short steep section; the rest is flat for speed. It’s an open-ended Backyard Ultra where..

XTERRA Matterley is an off-road sporting event held at the scenic Matterley Basin in Hampshire, United Kingdom. Scheduled for February 14-15, 2026, it offers a variety of race formats including duathlons and trail runs suitable for athletes of all levels. The duathlon races feature distances such as..

The Winter Railway Ultra is a multi-distance trail race staged along the River Severn, on a disused railway line between Ironbridge and Bridgnorth, near Coalport, Telford. Runners can choose from 9 miles, 13.1 miles (half marathon), 19 miles (three-quarters marathon), 28 miles, or 37 miles. Each out..

Two Tunnels Races in Bath, UK, organized by Relish The Great Outdoors, offer a unique underground running experience alongside city scenery. The courses pass through the Devonshire Tunnel (408m) and the longer Combe Down Tunnel (1672m), both well-lit and surfaced as a shared-use path—the longest und..

The Ironwood Challenge, organized by Nailsea Running Club, is a trail race near Long Ashton, North Somerset. The six-mile course runs through woodland, fields and forest, with sections that are often muddy. It is fully marked and marshalled, and chip timing is included for the first year.Off-road sh..

The Badger Challenge is a six-hour trail event held on 27 February 2026 at Beacon Hill Country Park, Lower Car Park, Leicestershire (LE12 8TA). Competitors complete repeated laps of a 3.3 mile off-road loop within a six-hour time limit; entrants choose how many laps to attempt. Entry fees are tiere..

The St David's Day Dragon Run 2026, organized by Saturn Running, takes place in the scenic Dare Valley Country Park in Aberdare, Wales. This 7-hour time challenge allows participants to run distances of their choice, starting from a minimum of 3km. The course features well-maintained footpaths with..

Brecon to Cardiff Xtreme is a winter mountain ultramarathon, a 75-km linear challenge from Brecon to Cardiff (about 47 miles) with roughly 2,700–2,800 m of ascent, including 11 summits such as Pen y Fan, Cribyn and Fan y Big. The Taff Xtreme Marathon is the second half, a 26.2-mile leg from Merthyr..

The Brecon to Cardiff Classic is a 70-kilometer ultra running race following the scenic Taff Trail from Brecon in the Brecon Beacons National Park to Cardiff. Now in its 12th year, this fully marked, one-way race features diverse landscapes, including dramatic mountains, waterfalls, reservoirs, and..

Up on the Downs, hosted by Tri-Counties Trail Running, takes place at Breamore House near Salisbury. Runners can choose from 5k, 10k (about 11.5k), or a half marathon, all starting and finishing at Breamore House. The route is mainly trail, 95% off-road, across farmland, footpaths and bridleways, wi..

The event is scheduled for 1 March 2026 at Brixworth Country Park, Northampton Road, Brixworth NN6 9DG. It comprises fully marked and marshaled trail races over two distances: 10k Half Marathon Both routes use trails and tracks around Pitsford Water. Races leave Brixworth Country Park, cross the..

The Imber Ultra is an annual trail run of 33+ miles. The next edition is scheduled for Sunday 1 March 2026. The event is organised by Avon Valley Runners together with the Rotary Club of Westbury. Free photos from the 2025 running are available online. Entries are planned to open around early Octo..

The Hateful 8 Ultra Loop is an ultramarathon challenge staged near Bridgend, South Wales, at the Bridgend Miniature Railway in Aberkenfig. Runners tackle a 9-mile loop and aim to complete as many laps as possible within an eight-hour window. The mixed-terrain course includes a challenging hill, a sc..

The Winter Green Man Ultra is a looped trail race around the Community Forest Path near Bristol. Distances offered: 45 miles / 72 kilometres 30 miles / 48 kilometres The 45 mile race is a full anti-clockwise loop starting and finishing at Ashton Park School. The 30 mile event is a partial anti-cl..

The event takes place on 8 March 2026 at Wellingborough Grammarians Memorial Sports Field, Sywell Road, Wellingborough NN8 6BS. It is organised by LDWA - Beds, Bucks and Northants and uses walking routes through Northamptonshire countryside. The event does not allow dogs. On-site parking is availab..

Humanity Direct Amersham Ultra is a one-day endurance event based at Dr Challoner’s Grammar School in Amersham, Buckinghamshire, set in the Chiltern Hills. Runners and walkers can choose from three distances: 50km ultra, 25km half ultra, or a 10km option. The route winds through the Misbourne and Ch..

The Nant Yr Arian Silver Trail Races take place on 14 March 2026 at Nant Yr Arian in the Cambrian Mountains. The event is organised by Aberystwyth Athletic Club and is the ninth edition. Routes are in mountain terrain, fully signed and waymarked, with marshals and GPX files available as backup. The..

The Hundred Hills 50km is a trail ultramarathon held on 14 March 2026 in the Chiltern countryside. The course comprises two different 25km loops and starts and finishes at Stonor Park. Distance is listed as 31 miles / 50km with approximately 4000 ft (1200 m) of climb. Terrain is mostly trail (80%)..

Saturn Too presents The Dashing Dog Charity Run - Wales at Dare Valley Country Park in Aberdare. This inclusive seven-hour time-challenge allows runners to complete as many laps as they wish, with a minimum 3 km per lap and a full lap around 7 km on paths, subject to safety changes. The scenic cours..