Trail running races & ultra marathons
Welcome to the trails.
Runaway Racing has been organising trail running events since 2017, including seven annual ultra marathons such as the popular Chiltern Ridge 50K.
We focus on creating friendly and exciting races on challenging trail routes around the UK.
The 2025 edition of The Ridgeway Challenge has been selected as the British Trail Running Championships, Ultra Distance event.
First, second and third place in both the women's and mens events will be awarded Gold, Silver and Bronze British Athletics Medals. Age Group prizes are awarded in five year categories from V35 all the way up to V80+.
Half Marathon Challenge
Our three half marathon races take place over a four-week period next summer, and we’re challenging you to complete them all!
With a total distance of 64km with 1,500m of elevation, you’ll experience some of the best trail running and views in the Chiltern Hills — plus, you’ll earn a special t-shirt!
The races are: Dunstable Downs Half (22nd June), Chiltern Ridge Half (6th July), Hughenden Valley Half (19th July) — Enter all three for just £86 (£80 affiliated)!
Our trail running races
Past results & photos
Not sure which race to choose, check out our past event results and photos.
Our Trail Running Races
Ranging from 10K to 100K ultra marathons, all our races take place on the trails in the beautiful English countryside.
Chiltern Ridge Classic 50K
An iconic ultra in the Chilterns, traversing the stunning ridgeline trails between Ivinghoe Beacon & Whiteleaf.
Chiltern Hills 100K
A 100K ultra marathon along the best and most loved trails within the Chiltern Hills.
The Ridgeway Challenge
An 86-mile (139km) point-to-point trail running race along the entire length of The Ridgeway National Trail.
Tewinbury Trail 10K
A trail 10K at the delightful Tewinbury Farm & Hotel just north of Welwyn in Hertfordshire.
Dunstable Downs Half Marathon
A trail half marathon with stunning views at National Trust's Dunstable Downs estate.
Chiltern Ridge Half Marathon
An epic half marathon along The Ridgeway National Trail in Buckinghamshire.
Hughenden Valley Half Marathon
Our half marathon distance is back in 2025! Take on our amazing route around the National Trust's Hughenden Manor and surrounding woodlands.
Hughenden Valley 10K
Our popular 10K route around the National Trust's Hughenden Manor estate near High Wycombe.
Wendover Woods 5 & 10K
Join us for a thrilling Friday night trail race at Wendover Woods, in support of the fantastic Chilterns Neuro Centre charity.
Suffolk Coastal Path 50K
Run the stunning Suffolk Coastal Path from Lowestoft to Aldeburgh.
North Chilterns 50K
Experience the magical North Chiltern trails, packed with ridgeline running and views for miles.
Chiltern Ridge Winter 50K
Our new winter route takes runners around a stunning 50K loop from Berkhamsted, featuring large sections along The Ridgeway.
Chiltern Hills Invitational
Our end of season 10K trail running championship event at Wendover Woods.
Greensand Country 50K
A stunning single loop 50K ultra marathon around the Greensand Country trails in Bedfordshire.
Superb information before we got there. The people at the aid stations were incredible well done to all involved. Brilliant event 👍
Nick
Suffolk Coastal Path 50K, 2023
Loved this race! Amazingly organised and the course is beautiful! My first half marathon race and I could not recommend it enough!"
Hannah
Chiltern Ridge Half, 2023
Chiltern Hills 100K
26th April 2025 | 100K, 1800m+
Keep up with the pace
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