How to get by car to Alto de Chorillos?

Deep in the rugged Salta Province of northwest Argentina awaits Alto de Chorillos, a high-altitude peak that'll leave you breathless (literally!). Situated in the heart of the Puna de Atacama, you'll feel like you've landed on another planet.

The adventure kicks off from RN51, the iconic highway that connects Salta to Chile. From the junction, it's a mere 6.2 kilometers (3.8 miles) to the summit, but don't let the short distance fool you. While the gradient is manageable, the real challenge is the elevation. At nearly 5,000 meters, your engine will be gasping for air, losing up to half its power! Expect a tightly hairpinned, bumpy gravel road that demands a 4x4 to handle the loose gravel and steep ramps leading to the LLAMA astronomical observatory.

The gravel track can be treacherous. Impassable in winter due to snow, it can close anytime snow isn't cleared. Even a bit of rain turns the arid soil into a slippery trap. If heights aren't your thing, be warned: significant drop-offs and narrow sections with no barriers abound. Proper preparation is key. Ensure your vehicle's cooling system is top-notch, and consider bringing extra oxygen or taking it slow to avoid altitude sickness.

The climate here is arid and cold, with highs ranging from 14°C to 21°C (57F to 70F). The real danger lurks in the freezing nights and midwinter extremes. Precipitation, mainly in the form of summer storms, can be sudden and violent. High winds are a constant, and the intense solar radiation at this altitude can quickly dehydrate you and your vehicle.

But why brave all this? Because reaching Alto de Chorillos means reaching one of South America's most advanced scientific sites. The LLAMA observatory sits atop the peak thanks to the thin, dry atmosphere, perfect for radio-astronomy. Conquering this high-altitude desert is an exercise in self-sufficiency. There are no services, water, or help for miles, so pack recovery gear and emergency supplies before leaving RN51. Get ready for an off-road experience that's as thrilling as it is scary!