Ruta Nacional 52 Abra del Acay High Pass

At 4,895 meters above sea level, Abra del Acay stands as the highest navigable pass in the Western Hemisphere, where RN52 cuts a brutal line across the Puna de Atacama between snow-capped peaks and windswept altiplano. The 240-kilometer route from Salta climbs relentlessly through San Antonio de los Cobres, past abandoned mining camps and salt flats that stretch to impossible horizons, before the final 40-kilometer assault to the pass where altitude sickness hits like a sledgehammer.

This expert-level route isn’t about technical driving — it’s about surviving 16,000 feet of elevation in a machine that’s gasping for air like you are. Any vehicle can make it if mechanically sound, but carry spare fuel, water, and altitude medication. Weather windows are critical — May through September only, and even then storms can shut the pass for days. Chilean border crossing adds bureaucracy, but the payoff is joining the thin ranks of drivers who’ve touched the roof of the Americas on four wheels.