Route 40 runs the length of Argentina. It is a famous bike touring heaven (and hell) in one snaking 5000km strip of dirt and asphalt. We see both sides of it in this episode as we sample the far northern section from La Quiaca to San Antonio de Los Cobres. Hear about Nic’s tangle with a puma at 4200m and the joys and struggles of family cycling in this extreme environment.