Ruta Provincial 78 – Meseta del Lago Buenos Aires

RP78 cuts across the windswept Meseta del Lago Buenos Aires where guanacos outnumber vehicles 100 to 1 and the horizon stretches unbroken to the Chilean border. This route from Bajo Caracoles to the lake shores near Perito Moreno crosses fossil-rich badlands where marine reptiles once swam in Jurassic seas. The road surface varies from decent gravel to washboard that’ll rattle your teeth loose, with the constant Patagonian wind making vehicle control a genuine skill.

Stock 4WD handles this route fine, but you’ll earn every kilometer fighting crosswinds and navigating washouts after storm events. Fuel range matters more than technical ability — the nearest station might be 200km away, and breakdowns out here mean serious exposure. Best avoided during winter storms (June-August) when snow and ice make the plateau treacherous. What you get is pure Patagonian solitude, endless skies, and the humbling experience of crossing one of South America’s last truly empty quarters.