The overall route from London to Athens is divided into 7 legs*.
Small groups of determined individuals take on very unpredictable conditions in a non-competitive manner from their leg's start city to its end city.
Once you're confirmed for a leg, it'll be down to you to raise your £500 contribution.
Legs vary in difficulty, so be sure to check which best suits your levels of fitness and experience.
Legs works on a first-come, first-served basis. They are limited to 17 people per week. When they're full, they're full.
* As important as your limbs might be to this trip, we're not talking about them here. We're referring to a leg as a one week section of the overall journey.