The old road to Argentina: thirty numbered hairpins stacked up the Caracoles to three thousand metres.
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Los Andes is where the day begins. Next is Río Blanco, climbing 600 m.
Río Blanco comes up 32 km in. The road climbs 600 m on the way up to it, steadily. Reckon on about 4 °C colder than the valley, and more in the wind. Next is Portillo, climbing 1460 m.
64 km in you reach Portillo. The road climbs 1460 m on the way up to it, hard. Reckon on about 13 °C colder than the valley, and more in the wind. Next is Caracoles, climbing 320 m.
The high point of this section, 3200 m up. The road climbs 320 m on the way up to it, steadily. Reckon on about 15 °C colder than the valley, and more in the wind. Nothing on this route is higher. At this height the road is a summer one: snow gates can stay shut into June and shut again in October.
A 529 km loop from Hornopirén ferry
A 174 km loop from San José de Maipo
Up the Maipo out of Santiago into the high Andes: gorge, then desert, then glaciers at the end of the tarmac.
San Salvador de Jujuy to San Pedro de Atacama · 771 km home again