Downhill ride
3,500 metres.
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A mountain road about 64 kilometres long, built in the 1930s, dropping from the icy La Cumbre pass at about 4,700 metres to the warm tropical forests of the Yungas along the edge of sheer drops, long known as the world's most dangerous road for its many accidents. Since a modern bypass opened, the old road has become a mountain-biking destination: riders descend about 3,500 metres in a day on organised tours, from ice and grey rock to waterfalls, dense forest and heat, on a narrow dirt track only about three metres wide in places. The scenery is stunning: deep valleys clothed in green, waterfalls pouring across the road and clouds climbing the slopes. Tours usually end in or near Coroico with a meal and rest before the bus back. The risk is real: choose a reputable company with good bikes, protective gear and guides, keep to a safe speed, and avoid the rainy season from December to March, when mud and landslides increase. Bolivia is under a state of emergency with protests and road blockades, so check road conditions and your government's travel advice before the trip.
3,500 metres.
Over the road.
Dense green.
From La Cumbre pass to Yanacachi and Coroico, north-east of La Paz
It remains risky, but tours with a reputable company, good gear, guides and a safe speed reduce the risk greatly; the dry season is best.