The area is a recognized microclimate zone known for its high concentration of negative ions due to the presence of mountain waterfalls.
The name 'Pasos Malos' translates to 'Bad Passes' or 'Difficult Steps,' referring to the challenging, steep terrain encountered by early settlers traveling by mule.
The site acts as the start of a trek that connects to the historic mining village of Pueblo Escondido.
The rock formations in this area are part of the Sierras Pampeanas, some of the oldest mountain structures in Argentina.
Pasos Malos is a high-altitude mountain trailhead located in the Sierra de los Comechingones, roughly 6 kilometers from the center of Merlo, San Luis. The area marks the transition point between the urbanized tourist zone and the rugged, unpaved terrain leading deeper into the mountain range. It serves as the primary gateway for trekkers attempting to reach the Saltos del Tabaquillo waterfall and the Cerro Áspero. The landscape is characterized by granite rock formations, native Espinillo vegetation, and the upper reaches of the Arroyo El Molino. The site is a natural lookout point offering panoramic views of the Concarán Valley. High-clearance vehicles are typically required to progress beyond the immediate parking vicinity due to the deterioration of the gravel access road. Local flora includes diverse mountain shrubs adapted to high wind exposure and rocky soil conditions.
The elevated rock outcrop overlooking the Concarán Valley at the start of the primary footpath.
Bring a windbreaker even in summer, as temperatures drop significantly when moving up the trail.
Carry at least 2 liters of water per person, as there are no facilities or potable water sources once you leave the trailhead.
Ensure your mobile phone is fully charged and offline maps are downloaded, as cellular signal is inconsistent.
Attempting to drive a standard low-clearance sedan too far past the designated parking zone.
Practice 'Leave No Trace' principles; carry all waste back to the city as there are no trash collection services on the trail.
