Join us for an exhilarating Half Marathon or 10K in the stunning Chiltern Hills!  

Run amongst picturesque sights, on this chance to bond with fellow athletes. Unwind, challenge yourself, and create lasting memories in the heart of the Chilterns. Known for its rolling landscapes, this Area of Outstanding Natural Beauty offers the perfect mix of challenging climbs, rewarding descents, and breathtaking scenery. Whether you're a seasoned trail runner or looking to test yourself on new terrain, this event promises an unforgettable experience. Sign up today and be part of a thrilling adventure in one of the UK’s most beautiful running locations!

This event will run along side the Chiltern 100 Cycle Sportif.
Sunday's Chiltern100 is delivered in partnership with Verulam CC Find out more here.

Join us on Saturday night at the campsite and enjoy the onsite entertainment with live music, food & bar!

Sunday 25th May
8am - Cycle Sportif - with three distances to choose from 160km, 100km and 60km, tackling the classic climbs for which the Chilterns are famous.
10am - Half-Marathon/10K Trail Run

ATW Transfer & Refund Policy

At ATW, we understand that sometimes plans change. While we do not offer refunds or transfers to another person, we provide a hassle-free event transfer option for those unable to attend their booked event. If you are unable to participate in your scheduled event for any reason—including injury, illness, pregnancy, bereavement, or other unforeseen circumstances—you can transfer your entry to any future ATW event. There is no proof required, we trust you!
Even better news, transfers can be made all the way up to 48 hours before your original event date.

Event Organiser

ATW was established in 2011 by James Shipley. We have now become a national events company in the UK, specialising in Running, Triathlon, Duathlon, Aquathon, Cycling, Swimming and all permutation of swim-bike run events. With over 40,000 entries a year ATW has become a firm favourite amongst people who are determined to Dream, Believe and Achieve.