Trail Running calendar near Harwell 2025-2026

Bradenham Blast is a trail running event in the Chiltern Hills at Manor Farm, Bradenham, near High Wycombe, UK. Boondock Events offers 5km, 10km, and a new half-marathon for 2025. The courses are hilly, scenic, and suitable for many abilities, weaving through tranquil beech woodland and rugged trail..

SOX 10km is a 10km multi-terrain race organized by Racing Line Running, taking place on September 7, 2025, starting and finishing at the South Oxfordshire Brewery taproom in Ipsden, Oxfordshire. The course blends private terrain, trails, woodlands, fields and local roads, with around 60% off-road an..

The Phil and Bonnie Bounder 6K Forest Run takes place at Moreton Village Hall in Moreton, Dorset. This scenic 6-kilometer race features woodland paths through the beautiful Moreton Forest, with the final kilometer running along a quiet country road. The event is open to runners aged 14 and over and..

Westonbirt Arboretum Summer 2025 is a multi-distance running event held at Westonbirt Arboretum, Tetbury, UK. Runners can choose from 1 mile, 5km, 10km and half marathon courses, with 10km and half marathon run in waves. The route winds through the National Arboretum’s varied gardens and species col..

The Sufferings is a multi-distance trail event in West Sussex, organized by Sussex Trail Events. The race begins at Washington Village Hall in Washington, RH20 4AP, and offers Half Marathon, Full Marathon, and a 39 Mile Ultra. Runners tackle the steep, rugged tracks of Chanctonbury and Cissbury ring..

The Farnham Pilgrim Marathon is a scenic and challenging running event held in Farnham, Surrey, starting from The Sands on Seale Road. The marathon offers spectacular views across the Surrey Hills, known for its hilly and multi-terrain course that tests runners' endurance. Alongside the full maratho..

HAVOC Twilight Series 2025 No.1 – South Ockendon is a mid‑week twilight street orienteering event in the village of South Ockendon, north of the Dartford Crossing and Lakeside. The event is MapRun-based with a single score course and two time limits: 60 minutes (Long) and 40 minutes (Short). Points..

Isle of Wight Fell Race Series, staged by Ryde Harriers, is the island’s Fell Running Championship Series incorporating the SEAA Fell Running Championships. The 2025 edition runs Saturday 13 and Sunday 14 September, with headquarters at St Catherine's School, Ventnor. It features three races: St Bon..

The c2c Essex Ultra 2025 is a charity ultramarathon along the Essex Riviera, held in September. Contestants can choose 50 miles from Upminster or 30 miles from Tilbury, finishing at Thorpe Bay. The course follows the Thames eastward, using the London Loop and England Coast Path, with mainly tarmac u..

Brighton 50/50 September 2025, organized by RunThrough UK, offers three trail distances—50 miles, 50k, and 23k—starting and finishing on Brighton Beach at Black Rock/Madeira Drive. The 50-mile route weaves from the beach through the South Downs to Beachy Head and back along the coastline, featuring..

Thames Path Challenge, part of Ultra Challenge Series, runs along the Thames Tow Path from Fulham's Bishops Park in west London to Henley-on-Thames. Distances include a full 100 km route (also a 2‑day daylight option), a 72 km 3/4, 50 km halves, and 28/22 km quarters, plus a 25 km Thames Bridges Tre..

Bradley Fell Race, a BOFRA Championship counter, takes place in Bradley Village, near Skipton, North Yorkshire. The 3.50-mile (5.60 km) course features about 800 ft (274 m) of climb, starting with a steady ascent up fields and tracks to High Bradley, then a steep climb to the top of Bradley Moor. Th..

The Sandridge 10k is a scenic trail running event set in the picturesque village of Sandridge, near St Albans. Participants can enjoy a beautiful 10k course that showcases the natural beauty of the area. The event is organized by Active Training World, and it promises a rewarding experience for both..

The Run London Epping Forest Trail 10k is a popular running event scheduled for September 14, 2025, in the scenic Epping Forest, Chingford. Participants will complete a 10k course consisting of two laps through the forest, known for its rich biodiversity and beautiful landscapes. The race is designe..

Takeley 10K is an off-road countryside race in Takeley, near Bishop’s Stortford, United Kingdom, along the Flitch Way. The 10 km course is GPS-measured, mostly on the old railway track and grass paths, with about 0.7 km on road to the finish. The route is about 90% off-road, with kilometre markers a..

The Alf Shrubb Memorial is a chip-timed running event held in Slinfold, West Sussex, celebrating the legacy of local running legend Alf Shrubb. The event features both 10k and 5k mixed trail races through scenic Sussex countryside, utilizing local footpaths, bridleways, and trails. The race starts a..

The Dunstable Downs Challenge Half Marathon is a scenic trail running event organized by Dunstable Road Runners, held at Creasey Park Football Centre in Dunstable. The 13.1-mile course takes runners across the picturesque Dunstable Downs and surrounding rural areas, primarily on public footpaths and..

The Ashtead 10k and 2k fun run, organized annually by Ashtead Running Group, takes place at Ashtead Common, a protected natural reserve in Ashtead, UK. The event features a challenging 10k race and a 2k kids' run on undulating rough tracks through a Site of Special Scientific Interest, known for its..

Thaxted Trail Marathon & Half Marathon takes place in Thaxted, Essex, starting from Thaxted Church Hall. The event offers two self-navigation trail distances: a marathon and a half marathon. There are no course markings or GPX files, and no marshals; participants follow a written route description i..

Epsom Street O is the opening event in MVOC’s eight-event Street O series, staged in the Mole Valley area around Epsom. The Barley Mow pub at 12 Pikes Hill hosts the start, finish and post-race refreshments. The course is a 60-minute Score (with a 40-minute option) on a 1:10,000 OpenStreetMap-based..