Race details

Discover the magical North Chilterns on a unique 50K loop, covering the best views and countryside in the area.

The 2nd edition will take place on Sunday, 8th October 2023.

Starting from Putteridge Bury, runners will explore the surrounding trails on our intricately designed course.

This is a delightful route to run, with several stunning viewpoints including Warden Hill, Barton Hills, Pegsdon Hills.

With 800m of hill-climbing, this race allows a nice balance of challenging terrain and faster trail running.

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50K Ultra Trail

£68 unaffiliated / £66 affiliated


Key Information

Sunday, 8th October 2023
Start Time
Putteridge Bury, LU2 8LE
Distance / Elevation
50km / 798m+
Max Runners
Time Limit
9 hours
Arrow markers and orange ribbons
Public Transport
Luton Train Station - 14 min drive to event base
UTMB Qualifier
UTMB World Series Index Race
£68 unaffiliated / £66 affiliated
Minimum Age
TRA Permit No. 5480. Race held under UKA rules.

Please scroll down to find a list of resources, such as GPX files, maps, videos and more.

View resources

Latest Updates

Overview Document
14th September

Check our race overview document for a summary of all the key information. Click the image below to view.

Route Flythrough video

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, a lovely undulating section to CP2 awaits.

Out of CP2 runners explore Pegsdon Hills and along 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.

CP 1 - Arnold Rec, Barton
CP 2 - The View
CP 3 - Offley Village Hall

Event resources

Last updated - 14th Sept 2023

GPX File
OS Maps
Google Maps
Printable map (PDF)
Info document
A downloadable PDF with all key race information.

Route Map

Previous editions

North Chilterns 50K 2022

Keep scrolling for more event info

Race Navigation
Race checkpoints

Aid stations

There are three aid stations along the route. These will contain the following items:

  • Water
  • Coke
  • Mountain fuel electrolyte drink (pre-mixed)
  • Mountain fuel energy gels
  • Selection of crisps and sweets
  • Tribe energy bars
  • Fresh fruit
Event base

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.

View on Google Maps

Required Gear

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 £68 (or £66 to 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

Entry details

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. If you are unsure how to set this up we will be creating some video content in the lead up to the race to help you.

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 via 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.

Withdrawal date
Race Credits
More than 12 weeks before race day
4-12 weeks before race day
2-4 weeks before race day
Less than two weeks to race day

To make a withdrawal request, please follow the button below and fill in the form.

Withdraw from race
Event withdrawal

Event partners

Mountain Fuel
UTMB World Series
She Races
Ugoku Projects
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