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Your Challenge 1

A trail of 2 Cities..

Walk it, or Jog it, or Run it

100km, 50km, or 25km options. Great off road route with full support all the way. Push yourself in 2016.

London to Cambridge

2/3 July - 100km, 50km, or 25km

The Challenge starts near the Olympic Park and heads up the fascinating Lea Valley - past locks, parkland, and on through beautiful open countryside to the historic city of Cambridge. Whether you take it on as a walk , jog, or run, you'll receive full support & great hospitality every step of the way. A tremendous sense of achievement awaits as the finish line is crossed and you reflect on how you went that extra mile!

Push yourself further in 2016 - with good preparation and determination - you'll be amazed at what you can achieve. Join us!

  • WALK IT - at your own pace ~ 24+ hours
  • Day & Night - continuous Challenge
  • JOG IT - run a bit, walk when it suits you!
  • RUN IT - fully supported 'Ultra Marathon'
  • Varied 100km route - 70% off road
  • 50km Half Challenge options available
  • NEW - 1st Quarter Challenge (~25km)
  • Join as an Individual or as a Team 
  • 'Relay Team' option for the 100km
  • FREE hot meals, drinks & snacks enroute
  • Pace walkers, physios, massage & medics +
  • Finishers T-shirt, medal & glass of bubbly!
  • Fundraise for a Charity of YOUR choice - Charity Fundraising places now sold out.
  • SELF FUND OPTION (no fundraising)


Call 0207 609 6695 to get in touch or email

Our other Ultra Challenges!

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29/30 April 2017

2017 Registration opening soon ...

Around the coastal path - 106km. Stunning scenery, Needles & cliff top views! 1/2 & 1/4 Challenge options also. Register your interest for 2017 NOW..


27/28 May 2017

2016 was amazing - join us next year!

Join 3000 others over the May Bank Holiday weekend - Richmond start - 100km & 60% off road. Now with 2 Day & 1/2 Challenge options also...

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27-28 Aug '16

NEW for 2016
Stunning Scenery!

An Eastbourne start, Beachy Head, Seven Sisters, South Downs Way, Brighton mid point, and Arundel finish. Full 100km and 50/25km options...

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10-11 Sep '16

Festival of events
New 2016 Options

Beautiful & historic scenery. Putney Bridge to Henley 100km or 50/25km legs. NEW Oxford to Henley Challenge & Thames Bridges Trek option


July & Aug '16

Amazing adventure
Spaces available..

2 marathon Treks for 200 adventurers over 2 days on the famous Laugavegurinn trail. Fantastic scenery, wilderness camping under midnight sun


Ultra Challenge Series Partners...

London to Cambridge Event Partners...

The Ultra Challenge Series will raise over £7.5 million for charities