Colworth Marathon Challenge

The Humanity Direct Tring Ultra is a one-day trail event on 20 September 2025, starting and finishing at Tring Cricket Club (HP23 5NG) in the Chilterns, Hertfordshire. Distances offered are: 50 km (full ultra, listed also as 31 miles) 27 km (half ultra) 10 km Ascent gain varies by distance, repor..

The Ouse Valley Way Marathon and Half Marathon take place on 21st September 2025. The event is organised by BRJ Run & Tri and uses the Ouse Valley Way route in the county of Huntingdonshire. The valley route covers 26.2 miles between Earith and Eynesbury, running along and near the River Great..

Clipston Trail Half and Country 5 Miler take place around Clipston, near Market Harborough, with start/finish at Clipston Recreation Ground, Station Road. The event offers two distances: a half marathon and a country 5-mile (ish) race, suited to trail newcomers or a shorter challenge. The routes run..

The Endless Garden – A Backyard Ultra Marathon takes place at The Waggoners in Ayot Green, Welwyn Garden City, United Kingdom, from 27 to 29 September 2025. The race uses a 4.167-mile trail loop run hourly on the hour, with the field whittling down to a sole finisher. The route is designed to be saf..

Thunder Races offers trail running events in Bedfordshire, UK, centered on Harrold-Odell Country Park. The events feature multiple distances, including a 25km and a 50km trail race, designed for both experienced ultrarunners and newcomers. Runners traverse runnable woodland and countryside around Ha..

The Grantchester Charity Runs, held near Grantchester village outside Cambridge, feature 10k and 3k races through scenic, predominantly flat farmland with no road crossings, ensuring a safe and pleasant course. The volunteer-run event supports Maggie’s Centre Cambridge and Addenbrooke’s Charitable T..