Photo: Molly Swift / Facebook

Adventure races don't get much tougher than the Godzone event which starts on Thursday in Marlborough.

Thirty-two teams of four are taking part, with the aim to cover 615 kilometres of often rugged terrain as quickly as possible on foot, mountain bike and even raft.

They can only use maps and compasses to navigate, and have to finish within eight days.

Hunger, fatigue, sleep deprivation and

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