Left : Pure elation at Run In Marseille , a festival of running held in the beautiful Mediterranean city in April . Right : A mosque in Riyadh provides a backdrop to the half marathon run through the Saudi Arabian city every February .

PHOTOGRAPHS MAGALI PAULIN / ASO , ROMAIN LAURENT / SFA , CHRIS HITCHCOCK

Scaling the heights of the remote Witteberg mountains at Skyrun 100 , a tough self-supported , selfnavigational race in the Eastern Cape .

18 | RUN FOR YOUR LIFE