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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.

Explore races

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+.

Race info

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)!

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Our trail running races

Chiltern Ridge Classic 50K 5th Apr 25
Chiltern Hills 100K 26th Apr 25
The Ridgeway Challenge 31st May 25
Tewinbury Trail 10K 8th Jun 25
Dunstable Downs Half Marathon 22nd Jun 25
Chiltern Ridge Half Marathon 6th Jul 25
Hughenden Valley Half Marathon 19th Jul 25
Hughenden Valley 10K 19th Jul 25
Wendover Woods 5 & 10K 1st Aug 25
Suffolk Coastal Path 50K 13th Sep 25
North Chilterns 50K 12th Oct 25
Chiltern Ridge Winter 50K 8th Nov 25
Chiltern Hills Invitational 30th Nov 25
Greensand Country 50K Returns in 2026

Past results & photos

Not sure which race to choose, check out our past event results and photos.

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Proudly partnered with

Trail Running Association
Precision Fuel & Hydration
UTMB Index Races
National Trust
Ugoku Projects
She Races
Athletic Brewing
Chiltern Society
Greensand Country
Chilterns Neuro Centre
Beds & Cambs 4×4 Response
Lowland Rescue (Bucks/Herts/Suffolk)
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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

National Trust The Ridgeway Point-to-Point

An iconic ultra in the Chilterns, traversing the stunning ridgeline trails between Ivinghoe Beacon & Whiteleaf.

Date & Time
5th April 2025, 09:00
Distance
50km (980m+)
Location
Berkhamsted to Wendover
Price
£70/68
Status

More info

Chiltern Hills 100K

100K National Trust The Ridgeway

A 100K ultra marathon along the best and most loved trails within the Chiltern Hills.

Date & Time
26th April 2025, 06:00
Distance
100k (1800m+)
Location
Chesham, Buckinghamshire
Price
£120
Status

More info

The Ridgeway Challenge

Historic Linear

An 86-mile (139km) point-to-point trail running race along the entire length of The Ridgeway National Trail.

Date & Time
31st May 2025, 10:00
Distance
86-miles / 139km (1800m+)
Location
Tring to Avebury
Price
£110
Status

More info

Tewinbury Trail 10K

Hertfordshire 10K Trail

A trail 10K at the delightful Tewinbury Farm & Hotel just north of Welwyn in Hertfordshire.

Date & Time
8th June 2025, 11:00
Distance
10km (180m+)
Location
Welywn
Price
£22/20
Status

More info

Dunstable Downs Half Marathon

National Trust Hilly

A trail half marathon with stunning views at National Trust's Dunstable Downs estate.

Date & Time
22nd June 2025, 09:00
Distance
21.2km (450m+)
Location
Bedfordshire
Price
£32/30
Status

More info

Chiltern Ridge Half Marathon

National Trust Chiltern Society Hilly

An epic half marathon along The Ridgeway National Trail in Buckinghamshire.

Date & Time
6th July 2025, 10:00
Distance
21.2km (526m+)
Location
Wendover
Price
£30/32
Status

More info

Hughenden Valley Half Marathon

National Trust Chiltern Hills

Our half marathon distance is back in 2025! Take on our amazing route around the National Trust's Hughenden Manor and surrounding woodlands.

Date & Time
19th July 2025, 09:00
Distance
Half Marathon (450m+)
Location
High Wycombe
Price
£30/32
Status

More info

Hughenden Valley 10K

National Trust Chiltern Hills

Our popular 10K route around the National Trust's Hughenden Manor estate near High Wycombe.

Date & Time
19th July 2025, 18:00
Distance
10K (195m+)
Location
High Wycombe
Price
£20/22
Status

More info

Wendover Woods 5 & 10K

Wendover Woods Charity Event

Join us for a thrilling Friday night trail race at Wendover Woods, in support of the fantastic Chilterns Neuro Centre charity.

Date & Time
1st August 2025, 19:00
Distance
5K & 10k (180m+)
Location
Wendover Woods
Price
£22/20
Status

More info

Suffolk Coastal Path 50K

Point-to-Point Flat

Run the stunning Suffolk Coastal Path from Lowestoft to Aldeburgh.

Date & Time
13th September 2025, 08:30
Distance
50km (120m+)
Location
Lowestoft to Aldeburgh
Price
£70/68
Status

More info

North Chilterns 50K

Chiltern Hills Pegsdon Hills

Experience the magical North Chiltern trails, packed with ridgeline running and views for miles.

Date & Time
12th October 2025, 09:00
Distance
50km (798m+)
Location
Luton
Price
£70/68
Status

More info

Chiltern Ridge Winter 50K

National Trust The Ridgeway

Our new winter route takes runners around a stunning 50K loop from Berkhamsted, featuring large sections along The Ridgeway.

Date & Time
8th November 2025, 08:00
Distance
50km (800m+)
Location
Berkhamsted
Price
£70/68
Status

More info

Chiltern Hills Invitational

End of Season Showdown

Our end of season 10K trail running championship event at Wendover Woods.

Date & Time
30th November 2025, 1030
Distance
10km (295m+)
Location
Wendover Woods
Price
£18/16
Status

More info

Greensand Country 50K

Shuttleworth Undulating Loop

A stunning single loop 50K ultra marathon around the Greensand Country trails in Bedfordshire.

Date & Time
Returns in 2026
Distance
50km (430m+)
Location
Bedfordshire
Price
£62/60
Status

More info

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

Keep up with the pace

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