Chiltern Hills 100K
Join Chiltern Hills 100K 2025
A 100K ultra marathon along the best and most loved trails within the Chiltern Hills.
Runaway Racing's debut 100K ultra marathon will take place on 26th April 2025 on a route that combines the most loved trails and landmarks within the central Chiltern Hills.
The route starts and finishes in Chesham with runners completing an anticlockwise loop passing many landmarks along the way, including Ashridge Esate, Ivinghoe Beacon, Coombe Hill & Bledlow Ridge.
Course details
The first leg to CP1 (15K) follows the Chiltern Link trail and heads east to Hastoe. From this first checkpoint, runners complete a loop around National Trust's Ashridge Estate, via Little Gaddesden (CP2), which includes a stunning section of The Ridgeway from Ivinghoe Beacon to Aldbury.
Once back at Hastoe (CP3 - 44k), runners will have access to their drop bag before continuing along The Ridgeway, passing through Tring Park, Wendover, Coombe Hill, Whiteleaf Hill (CP4 - 60K), and along to Bledlow Ridge.
The Bledlow Ridge Village Hall checkpoint marks 75K into the race; the final leg follows a selection of woodland trails through Hampden and along to Great Missenden.
From Missenden, the end is in sight as the loop is complete, and you arrive back in Chesham.
Start address: Girl Guiding Headquarters Chesham, Bury Lane, Chesham, UK
Finish address: Girl Guiding Headquarters Chesham, Bury Lane, Chesham, UK
Route map
Register
Registration closes on 26 April (155 days left)
selected tickets
Total
You can, within 24 hours after your registration, get a full refund if you change your mind.
We accept
What’s included
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done Finisher medal
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done Finisher’s T-shirts
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done Timing chip (single use)
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done Photo Service
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done Post-race meal
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done Drink Stations info
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done Nutrition Stations info
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done Medical Assistance
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done Bag drop
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done Toilets
Reviews
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Frequently asked questions
Mandatory equipment?
All runners will be required to carry the following items for the entirety of the run: Mobile phone (emergency number saved) Route GPX on watch/phone + paper map (provided) Waterproof/windproof jacket Waterproof trousers Additional long sleeve layer (to be kept dry for emergencies) Hat or buff Reusable soft cup Basic first aid supplies (plasters/tape/bandage/foil blanket) Headtorch + spare battery Refillable water/hydration system (0.5L min) Bag/vest to put everything in Race nutrition Cash or bank card
The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.
