Ojos del Salado — Argentine Route
✓ Verified against the agency · —The longer, more remote, and more scenic approach from Fiambalá via Ruta 60. Zero infrastructure above the trailhead — no refugios, no rescue, no cell service. Running water at Aguas Calientes (~4,200m) is the last reliable source before a 14km waterless stretch. Mule support available to El Arenal base camp. The final summit section merges with the Chilean route. This is expedition mountaineering: self-sufficiency is non-negotiable.
Safety classification
October to April only (Secretaría de Turismo de Catamarca: 'se pueden visitar entre los meses de Octubre y abril en compañía de empresas o guías especializadas'). Not safe May–September: winter storms, intense winds and temperatures near -20°C. Even in season the agency says to check the forecast before entering and to travel only with equipped 4x4 support.
- ▲Extreme altitude (6,893 m): agency requires a prior medical consult because of 'descompensaciones' — altitude decompensation hits even acclimatized climbers on summit day
- ▲Intense winds and temperatures near -20°C in season (agency figure)
- ▲Ice fields and walls of varying difficulty near the summit ('caminar por campos de hielo y escalar paredes de distintos grados de dificultad')
- ▲Extreme remoteness: 4x4-only zone; the agency says expeditions must carry logistics support, oxygen and rescue equipment — there is no rescue service on the mountain
- ▲The agency itself flags this side as prized 'por la dificultad de su acceso por el lado argentino' — the hardest access of the Seismiles
Expeditions leave from Fiambalá, 'Puerta de los Seismiles'; groups acclimatize at refugio Las Grutas. The province ties visiting the Seismiles to specialized companies or guides and to registered, authorized operators — treat a guide/operator as required. Registration with the Fiambalá tourism office is the stated local protocol, but current registration rules could not be confirmed on a reachable agency page (the old turismo.catamarca.gob.ar is retired into visitcatamarca.com, and provincial .gob.ar sites block external access) — confirm before travel via the official provincial tourism contact: infoturismo@catamarca.gov.ar / 0810-777-4321.