Event Ticketing and Registration

Humanity Direct Chiltern Challenge

50km Ultra

Organised by XNRG-HD
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19th July 2025

50km single stage trail ultra

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Humanity Direct Chiltern Challenge


a 31-mile, one-day ultra marathon in 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 Tring Ultra Donate £65 via entry 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 in 2023”

So, how does it work?

It's simple. Instead of charging an entry fee for the one day ultra marathon, XNRG ask you to donate £65 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 £65”


Places for this event go fast!

We give people a special opportunity to enter to run or walk 31 stunning miles of Chiltern Hills for FREE if you sign up to raise some money for patients. Alternatively, donate £65 to register – all the money will go to an operation to save or vitally improve a little child’s life, and you will have the opportunity to challenge yourself to do something amazing. In 2019 Humanity Direct Ultra raised £25,000 and helped fund life saving and life changing operations for 34 children - and we’re hoping to raise even more in 2023. 100% of donations go to children’s operations in Africa with Humanity Direct


The ideal 50km introduction to ultra marathon running. Escape to the Chilterns, an area of outstanding natural beauty. What's more, it's FREE to run, if you commit to raising funds for Humanity Direct.

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
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

Schedule
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
9:00 Runners start
08:45 Elite runners briefing (target time below 6 hours)
09:45 25km race briefing
10:00 half ultra start
14:00 Refreshments available
16:00 Prize giving or when enough winners have finished.

Route
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.



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Location

Princes Risborough School
Princes Risborough
Buckinghamshire
HP27 0DR Princes Risborough Buckinghamshire HP27 0DR



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