Trail Running calendar near Brentwood 2025-2026

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 marathon with 3.5 laps. The event features a supportive atmos..

The Winter Woolly 10km is a popular trail running event held annually on December 24th at Elstree School in Upper Woolhampton, Berkshire. Now in its sixth edition, the race features a scenic multi-terrain course covering 10 kilometers with 80% off-road paths, including lanes, footpaths, trails, wood..

The Knacker Cracker is renowned as "Britain's toughest 10k," featuring a challenging course that includes significant elevation changes, with a total ascent of 473 meters. The race, set in the scenic surroundings of Box Hill and Denbies Vineyard, offers a unique experience for runners, including a k..

The East Hanningfield Trail Marathon is a challenging off-road race held around the village of Danbury, starting and finishing at East Hanningfield Village Hall. The 26.2-mile circular course is approximately 95% off-road, featuring diverse terrain and navigated using written instructions rather tha..

Dark Skies Surrey Hills is an exhilarating night trail running event set in the picturesque Surrey Hills, featuring races of 10 miles, 10K, 5K, as well as Canix and children's races for ages 3-11. Participants navigate through enchanting woodlands under the stars, illuminated by headlamps, making fo..

The Fitstuff G3 Series No.1 is a trail running event held at Newlands Corner, Drove Road, Guildford, Surrey. Participants can choose between two distances: 10km and 15km. The event offers a scenic course starting from Newlands Corner, with parking available nearby.Runners can also opt for bundled en..

The Country to Capital Ultra Marathon is a renowned 43-mile point-to-point race starting at the Shoulder of Mutton Pub in Wendover and finishing near Little Venice Canal Basin in London. Serving as the official opener to the ultra running season, it attracts a global field of elite and amateur runne..

The Northampton 10K is a well-organized running event held at Northampton Racecourse Park, featuring a 2.2 km start followed by three laps around the racecourse. The course is accurately measured and takes place on pathway terrain, offering water stations and first aid support. Participants receive..

WTF - Where's The Finish? is a unique timed running event hosted by Zig Zag Running at Brandon Country Park in Suffolk, located in the heart of Thetford Forest. Participants choose between a 6-hour or 4-hour challenge, running multiple laps of a 5.3 km multi-terrain course featuring gravel footpaths..

The Zigzag - Windmill Way Wander is a multi-distance running event held at the Suffolk Running Centre in Bury St Edmunds, UK. Participants can choose from 5k, 10k, half marathon, full marathon, or ultra distances, all following the scenic Windmill Way route. The course is entirely on road, featuring..

The South Downs & Arundel Winter Trails is a trail running event held in the scenic South Downs area near Arundel. It offers challenging courses on rural, often single-track trails that traverse farmland and natural landscapes. Participants can choose between a 15-mile route and a full marathon dist..

The OMG (One Mile 2 Go) Run, organized by ZigZag Running, takes place at Bawsey Country Park, located on the B1145 between Queen Elizabeth Hospital and Gayton. This trail event offers multiple distance options including 5k, 10k, 15k, Half Marathon, Full Marathon, and Ultra Marathon, catering to both..

The Windsor Trail Run January 2026, organized by RunThrough UK, takes place at Alexandra Gardens in Windsor, UK. Set against the scenic backdrop of Windsor Castle, this event offers a flat, chip-timed trail course with two distance options: a 10K and a Half Marathon. Both routes feature well-marked..

The Ashdown Forest 10 & 5 Mile Series is an eco-friendly trail running event held at Pippingford Park Manor in East Sussex. Featuring two distances—10 miles and 5 miles—the races take runners through stunning park and forest trails with picturesque, undulating terrain. This sustainable event emphasi..

The Longbridge 100 Backyard Ultra is a challenging last-person-standing endurance running event held at Church Farm, Litlington, near Alfriston. Participants run a 4.2-mile loop every hour, starting precisely on the hour, continuing until only one runner remains. The course features a mix of single..

The Fitstuff G3 Series No.2 is a running event held at Hound House Road, Surrey (GU5 9JG). Participants can choose between 10km and 15km race distances. The start line and parking are conveniently located in a field off Hound House Road, marked by flags and signs for easy navigation.The event offers..

The Lavenham 10K Race is a scenic trail run held in the historic medieval village of Lavenham, Suffolk. The course covers 10 kilometers of mixed terrain, including footpaths, forest trails, shallow streams, and quiet rural roads, following the old disused railway line. This multi-terrain route offer..

The Peddars Way Ultra Marathon is a 48-mile ultramarathon held in Suffolk and Norfolk, England. The route follows the historic Peddars Way, an ancient pre-Roman trading path and Roman road, starting at Knettishall Heath Nature Reserve and finishing at Holme-next-the-Sea on the Norfolk Coast. The cou..

The Bedgebury Forest 10 and 5 Mile is a scenic trail running event held at Bedgebury National Pinetum and Forest in Kent. Featuring multi-terrain, undulating courses, the race offers 10-mile and 5-mile distances suitable for various fitness levels, along with a junior run for younger participants. R..

The Squirrel Challenge is a 6-hour running event held at Daventry Country Park, United Kingdom. Participants run or walk as many 3.3-mile laps as they wish within the time limit, making distances flexible from just over 5K to over 80K. The course features mostly crushed stone paths through tranquil..