Arroyo de las Piedras is a stream located in the Buenos Aires province of Argentina, flowing through the rich lowland waterway network characteristic of this region. Like many of the interconnected arroyos and ríos of the greater Buenos Aires delta and pampas system, it offers anglers access to a diverse community of native freshwater species in a setting defined by dense riparian vegetation, slow to moderate currents, and the murky, tannin-influenced waters typical of the area.