Starting close to the Olympic Park, up the Lea Valley and on to Cambridge 100 km later. A new route with 50km options. Walk it, jog it or run it! It's up to you!
Since 1999 we've been organising group challenges across the world and have helped to raise over £50 million for charities. We're based in London, and work in 30 countries in partnerships with the best local operators along with our own teams of experienced challenge leaders and event staff.