North Chilterns 50K
Race details
Next edition - 12th October 2025
Experience the magical North Chiltern trails, packed with ridgeline running and views for miles.
The 4th edition will take place on Sunday, 12th October 2025.
Hosted from the delightful Putteridge Bury Estate, runners will explore the surrounding trails and countryside on a 50K course.
This is a delightful route to run, with several stunning viewpoints including Warden Hill and Barton & Pegsdon Hills.
50K Ultra
£70/£68 (UKA Affiliated)
There's 42 weeks until this race, enter now while there's plenty of spaces available!
Key Information
Race held under UKA rules.
We are proud to be partnered with the Chilterns Neuro Centre, supporting people affected by multiple sclerosis (MS), Parkinson’s & stroke survivors.
Learn More
You will find Precision Fuel & Hydration products at all our aid stations. Check out their planner to tune up your race nutrition.
Launch PlannerImage Highlights
Route Map
Event Downloads
Last updated - 25th Sept - Route updated
Route Description
From our event base, runners follow the Chiltern Way towards Lilley and out to Warden and Barton Hills.
After leaving CP1, the first big climb awaits, but once successfully navigated there a lovely undulating section to CP2.
Out of CP2 runners explore the Pegsdon Hills and head towards to Offley.
The last 12k to the finish is a mini rollercoaster with three small hills to get up and down.
Overall the terrain keeps the running varied and doesn't ever feel like your doing too much of one thing.
Checkpoints
Videos
Keep scrolling for more event info
Aid stations
There are three aid stations along the route. These will contain the following items:
- Water
- Coke
- Precision Fuel & Hydration - PH 1000 Electrolyte Drink (pre-mixed)
- Precision Fuel & Hydration - PF 30 Gels
- Precision Fuel & Hydration - PF 30 Chews
- Selection of crisps and sweets
- Chia Charge Mini Flapjacks
- Selection of Fresh fruit (banana, orange, watermelon)
Event base
Our event base is held at the beautiful Putteridge Bury Country House.
There will be indoor facilities for registration and toilets. Coffee and other hot drinks will be available.
Our start/finish area will be situated at the back of the property, with direct access to trails.
Required gear
All runners will be required to carry the following items for the entirety of the run:
- Mobile phone (emergency number saved)
- Route map on watch/phone or paper map (provided)
- Windproof or waterproof jacket
- Refillable water/hydration system (0.5L min)
- Cash or bank card
- Warm hat (recommended)
- Foil Blanket (recommended)
Entry details
Registration is £70 (or £68 to UKA affiliated runners), runners must be aged 20 years or older.
- Entry to the 50km race
- Event permitted by the TRA
- Finishers medal
- Chip timing with live results
- Three on-route aid station
- Course wide medical support
- Bag drop
Event FAQs
We've answered some common questions below. Please contact us if you have any further queries.
How difficult is this race?
Our North Chilterns event is undulating throughout, with a few sharper hill climbs scattered throughout. The route is similar to our Chiltern Ridge 50K, however due to the autumn date it is likely the ground conditions may be softer and more challenging.
Do I need to qualifiy?
No, there are no qualifiying standards required to enter this race.
I'm worried about getting lost?
Our route will be marked throughout with orange signage/ribbons, along with marshals at several key points. Course checkers will be out during the race ensuring that signage remains in place.
We ask runners to make sure they have access to the route via a phone or watch, to act as a backup in an emergency.
What are the cut-off times for this race?
There is an overall 9-hour time limit for this race. Anyone running significantly behind this time at each checkpoints will be monitored and maybe advised to stop for safety reasons.
Where can toilets be found at this event?
There will be fixed seperate male & female toilets at the event base. Toilets will also be available at all three of our checkpoints.
Are there changing facilities available?
We will provide a private female changing area within a room onsite at Putteridge Bury.
How can I attend this event without a car?
Luton is the closest train station to our event base. From the station it is a 10/15-min taxi journey.
What footwear should I wear at this race?
Please wear trail running shoes for this race. The trails are generally non-technical, but there will be plenty of mud around at this time of the year.
What prizes are awarded at this event?
There are awards for the top three male and female finishers overall, along with age category awards for FV40, MV40, FV50, MV50, FV60, MV60, FV70, MV70.
How do I follow the route using my phone or watch?
Most GPS watches allow you to upload a GPX file of the route for you to follow whilst running. Typically this is done by loading the GPX file into the app (i.e Garmin Connect), and then syncing your phone/watch together.
If you don't have a GPS watch we would recommend using OS Maps (£20/year) or Strava Premium (£48/year).
Withdrawal options
By entering our race, you agree to the following withdrawal policy. This policy applies to all runners with the exception of women of cannot compete due to pregnancy.
*Entrants to The Ridgeway Challenge are entitled to defer their entry for up to 2 years, or receive a 90% entry voucher to use on any Runaway Racing event.
Credits can be used on future race entries, any time during the following 2 years.
Withdrawal requests must be completed online via our manage booking functionality.
Manage Booking
I had an absolutely amazing time. Everyone was friendly and helpful and the route was well marked!
Clare
North Chilterns 50K, 2023
Thank you so much to you and the teams of marshals / check-point volunteers. It was my first ultra and I thoroughly enjoyed it. You created a supportive and engaging atmosphere among runners and organisers alike.
Mike
North Chilterns 50K, 2023
Our trail running races
Past results & photos
Not sure which race to choose, check out our past event results and photos.