About 350 adventurers from nine countries set out on Saturday to climb , raft , bike and run in a 323-mile ( 517-km ) endurance race through the Canadian wilderness .
<response> About 350 adventurers from nine countries set out on Saturday to climb , raft , bike and run in a 323-mile ( 517-km ) endurance race through the <misc>Canadian</misc> wilderness . </response>