Trail Running calendar near Diss 2025-2026

The Zig Zag Marathon and Half Marathon take place at the Suffolk Running Centre in Bury St Edmunds, UK. The marathon follows the officially measured, scenic Kirtling Route, which is fully on road and mildly undulating, while the half marathon uses the Windmill Route, both featuring quiet roads. The..

The Halstead & Essex Marathon, held annually in North Essex, celebrates its 30th year in 2026. Established in 1995, the event is hosted by Halstead Road Runners and attracts runners from across the UK. The marathon course features scenic, low-traffic roads through rolling hills, woods, and farmlands..

The Five Rivers Ultra is a scenic ultra-endurance running event held along the wild North Essex and South Suffolk coastline, finishing in Harwich, Suffolk. It offers three distance options: 100 miles, 50 miles, and 50 km, all featuring generous cut-off times. The point-to-point course traverses beau..

Farmmageddon is an endurance running event held at Hyde Hall Farm, Buntingford, SG9 0RU. Returning for its second year, the event features a challenging 100-mile race completed over 32 hours across two days. The course consists of a 5.3 km loop combining trail, grassland, and some tarmac paths, suit..

The Grim Reaper Running Festival 2026 takes place at the scenic Grimsthorpe Castle Estate in South Lincolnshire. Scheduled for May 23-24, the event offers multiple race distances: solo 10, 40, 70, and 100 miles, plus a 100-mile team relay. The course features a fully marked 10-mile loop combining gr..

The Three Castles 50km Ultra Marathon is a scenic race held in Kent, England, starting in Rochester and finishing at Tonbridge athletics track. The flat course follows the River Medway, passing three medieval castles, charming villages, and lush countryside along the Medway Valley Walk. Runners expe..

The Circuit du Sore Legs is a unique running event held at Wodson Park Sports and Leisure Centre in Ware, Hertfordshire. Participants run on a traffic-free 400-meter athletics track, with distances ranging from 5k to a 6-hour challenge, including half marathon, full marathon, and 50k ultra options...

The Sundowner Marathon is a unique running event held in Purleigh, Chelmsford, England, featuring a scenic course that passes along canals, over waterfalls, through vineyards, woodlands, and coastal saltmarshes. This marathon offers a distinctive experience by starting early on a summer evening and..

The Suffolk Back Yard Ultra is a highly competitive endurance running event held at High Lodge in Thetford Forest, Suffolk. Participants run a 4.167-mile loop every hour on the hour, continuing until only one runner completes a loop within the hour time limit. The course is flat, wide, and scenic, f..

The Valley of the Owls Run, organized by Zig Zag Running, takes place at the Suffolk Running Centre in Bury St Edmunds, Suffolk. The scenic course passes through the village of Ousden, known as the Valley of the Owls, featuring some of England’s oldest roads and beautiful countryside. Participants c..

The Nene Valley Trail Run is a friendly and scenic off-road running event held at Castle Farm Campsite in Fotheringhay, near Peterborough. Scheduled for June 13, 2026, it offers two race distances: 10 and 20 miles. The courses traverse the beautiful Nene Valley trails, featuring easy tracks through..

Solstice at the Lakes is a timed trail running event held at Leybourne Lakes Country Park in Kent, featuring 6-hour, 12-hour, and 24-hour race options. Participants can compete solo or in teams (pairs or up to four runners) on a flat, fast, and scenic 2.5km loop combining trail, gravel, and tarmac s..

The Dunstable Downs Half Marathon is a scenic 21.2 km trail race held at the National Trust’s Dunstable Downs estate in the UK. Featuring over 450 meters of elevation, the course offers a challenging mix of sweeping ridge views, fast descents, and tough climbs, making it suitable for trail runners o..

The Summer Solstice Challenge in Colchester is a unique running event held at the scenic Abberton Reservoir Visitors Centre. Taking place on the longest day of the year, participants run laps of just over 5k on off-road paths around the reservoir, enjoying beautiful countryside views and abundant wi..

Run Sandringham 10K & 5K is a scenic running event held within the Royal Sandringham Estate in East Anglia. Open to runners aged 16+ for the 10K and 12+ for the 5K, the race offers a mixed-terrain course featuring approximately 30% trail and 70% road surfaces, winding through the estate's picturesqu..

The Colworth Marathon Challenge is a unique running event held at the scenic Colworth Estate in North Bedfordshire, UK. It features three races over three days, combining distances of 5 miles, 8.1 miles, and a half marathon of 13.1 miles, totaling the full marathon distance of 26.2 miles. The event..

The Cock-a-doodle Dawdle, organized by Zigzag Running, is a trail running event held at the scenic Hyde Hall Farm in Buntingford, Hertfordshire. Now in its third year, the race offers multiple distance options including 5k, 10k, 15k, Half Marathon, Heavy Half Marathon, Full Marathon, and Ultra Marat..

The Full Essex Way Ultra is an 82-mile ultra-marathon starting at Epping tube station in London and finishing at the high lighthouse in the historic port of Harwich. The race follows the scenic Essex Way trail, featuring mixed terrain including trails, footpaths, tracks, and roads, with a total elev..

The Bishop's Stortford Mitre 10k, 5k, and 1k is a community road race held in East Hertfordshire, starting from Jobbers Wood sports ground near Much Hadham. Open to all ages and abilities, the event features professionally measured 10k and 5k courses on traffic-free country lanes with gentle undulat..

Fen Gallop 2026 is a scenic running event held in Willingham, Cambridgeshire, featuring flat, multi-terrain courses along country roads, footpaths, and bridleways. Participants can choose between a 10K race or a shorter 4-mile option, both offering chip timing. The event welcomes runners aged 15 and..