Pilgrim Challenge 2025 now open for booking!

All 2024 events open for booking!

XNRG's mission is to help people challenge themselves and break through their mental and physical barriers, whilst providing peace of mind with expertly run events, going the extra mile for every competitor.

Our heartland is multi-day endurance events; we originally started to help people training for the world's toughest desert footrace, the Marathon Des Sables. Today, we welcome hundreds of competitors across our events, from single day ultra marathons to multi-day events.

We can't wait to welcome you!

Our team

Neil Thubron

Neil Thubron

Neil is the Founder and Director of XNRG. He was introduced to extreme fitness events during his 12 years in the Territorial Army where he completed some of the toughest challenges the British Army has to offer.

He loves endurance activities and is a firm believer in constantly pushing personal boundaries. Neil has competed in many endurance events over the years from marathons, to Ironman to multistage multi-sport events such as the Marathon Des Sables.

Neil's passion for extreme endurance events was the driving force behind setting up Extreme Energy. He aims to enable people to challenge themselves and break through their mental and physical barriers.

Neil's latest endurance event was the Yukon Arctic Ultra. Advertised as 'The world's coldest and toughest ultra!' He entered the 300 mile event and finished first, testament to his competitive spirit.

Neil is also a motivational speaker and executive coach. He links his passion and experiences from endurance sporting events to the personal motivational drivers that are needed in the business world. Neil's experience in the business world comes from 25 years of leading large multinational sales.
Anna Thubron

Anna Thubron

Anna is the Founder and Director of XNRG and has always been a natural athlete.

As a youngster she swam for the GB team and is now a personal trainer by profession. Her sporting successes include winning several half marathons, starting the London Marathon twice as an elite runner behind Paula Radcliffe!, coming 10th British female in the Austrian Ironman, as well as winning several adventure races partnering Neil in the mixed pairs.

Anna was introduced to endurance ultra running by Neil and has completed several ultra marathons and multistage ultra marathons over the past few years.

Anna has a passion for seeing people succeed and also has a passion for making sure people have a great time at our events.
Brian Thubron

Brian Thubron

Brian manages XNRG Administration. He is Neil’s father and has been a huge part of the Extreme Energy team since the company started back in 2009.

Whilst he's never been a runner he loves being part of a team which enables so many dedicated sportsmen and sportswomen to have a great time and achieve such fantastic results.

Brian looks after most of XNRG's event admin and logistics including looking after event bookings and creating routes, route cards and GPS data. He is also always at every event doing so much more than one person should be able to do in one day!
Richard Hurd

Richard Hurd

Richard, XNRG's Course Manager has been a key pillar of the Extreme Energy team since we started in 2009.

Anna and Richard have been friends since their youth and Neil and Richard have been good mates for 15 years. Whilst not an endurance runner Richard does run to keep fit, and enjoys endurance events, but more the sailing type. In 2003 Richard and Neil were part of a 6 man crew that completed the notorious Fastnet Race.

Rich recently accompanied Neil on the Yukon Arctic Ultra where he was part of the support team. A "Pilgrim Challenge" checkpoint it was not!

You will always see Richard with a smile and an encouraging word to all competitors as they make their way around the course whilst running around covering all of our event photography.
Ian Chappell

Ian Chappell

Ian looks after Event Booking & Planning for our events and is also a member of the core crew team.

A former XNRG customer, he enjoyed the experience so much he joined the company!

Our Vision

To be a global multi day events company that inspires people to push themselves past their physical and mental limits.

Everything we do is Extreme and the service we provide revolves around providing an outstanding experience for our clients.

We are a respected responsible business that our sponsors and advertisers want to be part of and our clients keep coming back for more. The advantage to our clients is that we provide a total package solution for a multi day experience of extreme activity.

The advantage to our sponsors and advertisers is being associated with a high quality product which delivers an outstanding experience to our clients and anchors them with high positive emotions to their brand.

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