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.
Trail Running races in the Chiltern Hills
The Chiltern Hills National Landscape is a idyllic part of the world, packed full of dense woodland trails, ridge-line views and quaint villages - Check out our 9 events in the area 👇
- 1. Chiltern Ridge Classic 50K18/4/26 A point to point ultra from Berkhamsted to Wendover.
- 2. Chiltern Hills 100K9/5/26An epic circular route in the east Chilterns.
- 3. The Ridgeway Challenge30/5/26Run the entire trail (139km) from start to finish in under 28 hours.
- 4. Dunstable Downs Half21/6/26Undulating route along a stunning chalk ridgeline.
- 5. Chiltern Ridge Half12/6/26A classic race spanning the trails between Wendover and Princes Risborough.
- 6. Hughenden Valley 10K & Half19/7/25A variety of hills, ancient woodland and single track trails.
- 7. Race the Light 5K & 10K1/8/25Undulating woodland trails at their very best.
- 8. North Chilterns 50K12/10/25Discover a hidden gem in the Chilterns.
- 9. Chiltern Ridge Winter 50K1/11/25A cracking loop from Berkhamsted.
Our Trail Running Races
Ranging from 10K to 100K+ ultra marathons, all our races take place on the trails in the beautiful English countryside.
Suffolk Coastal Path 50K
Run the stunning Suffolk Coastal Path from Lowestoft to Aldeburgh.
Wild Run Cotswolds
Race through the wild, secluded forests of Wychwood at the stunning Cornbury Park in Oxfordshire.
North Chilterns 50K
Experience the stunning North Chiltern trails, with flowing ridgeline running and views that stretch for miles.
Chiltern Ridge Winter 50K
Experience the autumn/winter edition of our classic Chiltern Ridge race, following a scenic single-loop 50K course starting and finishing in Berkhamsted.
Chiltern Hills Invitational
Our end of season 10K trail running championship event at Wendover Woods.
Chiltern Ridge Classic 50K
An iconic ultra marathon 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.
Dunstable Downs Half Marathon
Take on a scenic trail half marathon set in the heart of the National Trust’s Dunstable Downs estate.
Chiltern Ridge Half Marathon
An epic half marathon along The Ridgeway National Trail between Wendover & Princes Risborough in Buckinghamshire.
Race The Light at Wendover Woods
Join us for an exciting Friday evening trail run at Wendover Woods, raising funds for the amazing Chilterns Neuro Centre charity.
Tewinbury Trail 5K & 10K
A trail 5K & 10K race at the delightful Tewinbury Farm & Hotel just north of Welwyn in Hertfordshire.
Hughenden Valley Half Marathon
Join us for a scenic race through the beautiful grounds of the National Trust's Hughenden Manor and its surrounding woodlands.
Hughenden Valley 10K
Our popular 10K route around the National Trust's Hughenden Manor estate near High Wycombe.
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
9th May 2026 | 100K, 1800m+
Keep up with the pace
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