Event Ticketing and Registration

Humanity Direct Chiltern Challenge

Organised by XNRG-HD
13th July 2024

A single day 50km trail run or 25km option on a beautiful course in the Chilterns. Race for free if you raise sponsorship for Humanity Direct

Joel’s operation will help him breath properly
Jeremiah is now able to have his final operation
Promise needs surgery so she can breathe properly
Mackliine needs surgery so she can breathe properly
Edwin needs surgery to correct a birth defect
9-yr-old Shira needs surgey to help her breathe properly
Joy needs surgery for a birth defect
7-yr-old Hytham needs surgery that will change his life
There are 3 events to choose from

Humanity Direct Chiltern Challenge

Choose either a 50km Ultra or a 25km race through the picture-perfect Chilterns in aid of funding life-changing operations for children in developing countries.

Donate to Race!
A Unique Opportunity with XNRG's Humanity Direct - Donate the entry fee or pledge to raise as much as you can instead of paying to enter an ultra marathon.

Humanity Direct is saving and changing the lives of children in developing countries who desperately need surgery.

Why we do it
In 2019 Humanity Direct raised £24,000 through the three Humanity Direct Ultras, which helped fund life saving and life changing operations for 35 children and we are hoping to raise even more this year

So, how does it work?
It's simple. Instead of charging an entry fee, XNRG ask you to donate the equivalent value to fund a vital operation - or, if you prefer, you can start a fundraising page instead and raise as much as you can, with a minimum of the entry fee.

Places for this event go fast!

100% of donations go to children’s operations in Africa with Humanity Direct

The 50km is the ideal introduction to ultra marathon running. Escape to the Chilterns, an area of outstanding natural beauty.

This popular race is especially good for those looking for a supportive event for their first ultra within easy reach of London.

As with all of our events, everything is taken care of at the Chiltern Challenge so you can focus on the experience!  We’ll provide transfers from the station, free parking, free photos, changing facilities and heaps of tea and cake.


Entries will close one week before the event (or when full). A waitlist option will be available if the event becomes fully booked.

Start / Finish

Start and finish: Princes Risborough School, HP27 0DR

07:00 Minibus pick up starts from Princes Risborough Station
07:00 Registration open
07:30 Walkers briefing
08:00 Walkers Start
08:15 Runners race briefing
09:00 Runners Start
10:00 Half Ultra Start
14:00 Refreshments available
16:00 Prize giving or when enough winners have finished.


Stretching from the River Thames in Oxfordshire to Hitchin in Hertfordshire, the Chiltern Hills are a spectacular Area of Natural Beauty boasting some of the finest protected countryside in the UK.

The well-marked circular route will start and finish at Princes Risborough School, incorporating four checkpoints, approximately 10km apart.

Using National Trails and Footpaths, there are clear signposts and post discs, as well as our signs and confidence tape. We'll also give you a handy map, designed to help on any tricky sections.

  • Essential Information
  • Features common to all events
  • Facilities
  • Parking On-site
  • Race Features
  • Awards
  • Solo Event
  • Race Route
  • Checkpoints
  • Catered Checkpoints
  • Circular Route
  • Downloadable Files
  • Gallery
  • Independent blogs and reviews about this event

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