Portezuelo de Guaitiquina: Driving the remote 4,288m border pass

Ready for an off-the-beaten-path adventure? Portezuelo de Guaitiquina, a whopping 4,288m (14,068ft) high, straddles the Chile-Argentina border, offering a wild and solitary experience unlike the busier Paso de Sico. This route carves through the stunning, high-altitude deserts of the Andes, connecting Chile's Antofagasta Region with Argentina's Salta Province.

This pass links you from the area near San Pedro de Atacama in northern Chile all the way to the village of Catua in Argentina. The road itself is about 58.1 km (36.1 miles) from the B-357 junction in Chile to the border with Salta. Think stark beauty: salt flats, dramatic volcanic peaks, and endless horizons. It’s a forgotten corner, so prepare for minimal traffic and a whole lot of silence.

Yep, it's all gravel. Known as RP37 in Chile, it morphs into an unnamed track on the Argentine side leading to Catua. Be warned, this climb is steep! And the thin air will definitely put your engine to the test. Rain turns the gravel into a slippery mess, making those inclines extra challenging. While technically open to all vehicles, a high-clearance 4WD is your best bet for dealing with the washboarding and sand drifts.

The altitude is the biggest challenge here. At 4,288 meters, altitude sickness is a real possibility. Acclimatize properly! But there's another, more hidden danger: landmines. Parts of this border area were mined back in the 70s. While areas near the main road have been cleared, it's crucial to stick to the track and avoid wandering off into the desert.

If you're crossing the border here, it's usually open from 8 am to 6 pm. But, because it's so remote, hours can change without warning due to weather or staffing. The climate is arid but can get brutally cold fast. Strong winds are common, and winter can bring snow and ice. Pack extra fuel, water, and cold-weather gear because help is a long way off, and cell service is non-existent.