Back for its fifth year, we're challenging you to join hundreds of people across the country to swim 2.4 miles, cycle 112 miles and run 26.2 miles in one week.
Choose your Will of Iron week. Sign up today
You can take part at the gym or outdoors, solo or as part of a team. Your team can be as little as two people or as many as you like, there's no limit. You and your teammates can divide the challenge by discipline (cycling, swimming or running) or choose all three and divide the distance.
This year, Will of Iron will take place throughout July but you can choose when to start your challenge. All you need to do is complete the distance over seven consecutive days.
Do as much or as little as you like and still call yourself a triathlete!
We can’t wait to have you on the team.
If you have any questions about your Will of Iron challenge, or if you'd like to take part at a different time, please get in touch with Carol on email@example.com