There's a free marathon happening in London this autumn (but it's a secret) https://t.co/8WV0ccIIrg

Secret Marathon in TimeOut https://t.co/hrpzpiuj3z

Heard about #London's secret marathon? https://t.co/mU5tUzLNUB @secretmarathons

To clarify, the exact date and location will be announced next month. There will be plenty of time to make plans #secretmarathon

Secret Marathon London featured in Runners World today -

How cool does this sound (yep I said cool,daddy cool eh) https://t.co/qlYtPkgIzR very interesting. You can follow them @secretmarathons

Apply for the newest London marathon, Secret Marathon, here -

Secret Marathon London 2016 entry is now open! #marathon #london https://t.co/C40BrKdh9B