Contact Us

London office open Mon to Fri - 9.00 am to 5.30 pm.

Registration & Event Enquiries

Call us on 0207 609 6695 or email

Volunteering & Event Staff Opportunities

To find out more about how you get involved, please visit our Action Crew page below. 

Enter our Crew Space

Press & Media Enquiries

Email us at or call 0207 609 6695

Facebook & Twitter

Follow us @UltraChallenges

Sponsorship Opportunities

We are looking for suitable partners to compliment our Ultra Challenge brand. We'll have 18,000 participants in 2018, and a data base of 40,000+ past participants - with a loyal following based on delivering the UK's best endurance events and a great participant journey - enabling ordinary people to push themselves further!


This website is owned by Action Challenge UK Ltd - a Limited Company registered in England and Wales. Reg No: 03825838 - Reg Office: Suite 2, Rosehill, 165 Lutterworth Road, Blaby, LE8 4DY

Ultra Challenge Series Partners

Isle of Wight Challenge Partners