evidence: Monte San Lorenzo (3706m) is the second highest mountain in southern Patagonia, but being both remote and often cloud covered this isolated and impressive peak sees little of the limelight that its more famous neighbours such as Monte Fitz Roy and Cerro Torre (190km distant) experience. A chance encounter with United States peak bagger Sean O’Rourke (Dr Dirtbag) back in Araucanía and subsequent correspondence led to Sean putting this mountain on our radar. Sean suggested that attempting to access the mountain’s climbing base camps might be our sort of bikepacking adventure. The Chile/Argentina border traces a line across the middle of this mountain, and it’s climbed from both countries, with base camps in each, which, as the crow flies, are only 17km apart. But to travel between them legally is a journey of 330km. While the map suggested that a 4WD track crossing the border fairly close to the two camps might be a convenient shortcut, we weren’t keen to make an illegal crossing.