A pre-dawn assault on Patagonia's most dramatic mountain terrain
The flagship event traverses 113 kilometers through southern Patagonia's most dramatic terrain — glacial lakes, ancient Lenga beech forests, peat bogs, and high Andean ridgelines above Ushuaia. Starting at 3am under a southern sky, runners loop through iconic checkpoints at Cerro Castor ski resort, the Valle de Lobos valley, and the Olivia River gorge before returning to Ushuaia on the Beagle Channel.
Experienced ultrarunners
Ushuaia, Tierra del Fuego, ArgentinaMarch 21, 2026
| Location | km | Elevation |
|---|---|---|
Start Start | 0.0 | 0 m |
Finish Finish | 109.8 | 0 m |
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No crew rules specified
Patagonian weather changes rapidly — wind, rain, and cold possible even in March; hypothermia risk on exposed terrain
Night temperatures can drop below 0°C at altitude in Tierra del Fuego during March
Strong southern Patagonian winds on exposed ridgelines and open terrain
No required gear specified
No recommended gear specified
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