Paso Pehuenche, Mountain pass at Argentina-Chile border, Mendoza Province.

Paso Pehuenche is a border crossing at 2,553 meters elevation between Argentina and Chile, reached by Argentina's RN145 and Chile's CH 115. Both routes are fully paved from Talca to Malargüe. The Chilean border complex sits near Laguna del Maule, while Argentine customs is at Las Loicas.

From the 17th to the 19th century the pass carried trade in textiles, Chanco cheese, charqui and salt, which Spanish colonial and early republican authorities tried to limit. A Spanish military expedition in 1780 found a Pehuenche encampment in the pass and killed 116 Pehuenches; peace treaties with the tribes followed in 1783.

The pass is named after the Pehuenche people, who had an encampment here when a Spanish military expedition arrived in 1780. They traded across the mountains for Chilean grain because their own lands were poor for farming. Peace treaties between the pass's tribes and Spanish authorities followed in 1783.

The pass is open almost all year, closing only after heavy winter snowfall. Border control sits at the Complejo Fronterizo Pehuenche near Laguna del Maule (km 138 of CH 115); hours are 8:00–18:00 on CH 115, or 8:00–21:00 between La Mina and the lagoon. Argentine customs is at Las Loicas, and the nearest Chilean police post is La Mina, 62 km away.

Travelers can view the Laguna de Maule and spot several waterfalls fed by the Maule River along the route. The area offers good opportunities to see condors and foxes moving through their natural mountain habitat.