The Arroyo Mártires Grande is a stream flowing through the lush subtropical landscape of Misiones Province, Argentina. It serves as a small branch of the larger Paraná River, which it eventually joins. A standard paddling route on this water body covers approximately 4 kilometers and is consistently rated as low difficulty, making it accessible to paddlers without advanced technical skills. This route is often combined with a 2-kilometer walk, forming a combined kayaking and trekking excursion. The waterway flows near the city of Posadas, with one pleasant tour starting at Avenida Padre Juan and following the stream's banks. The overall character of the paddling experience is shaped by the surrounding subtropical environment. Access points, boat ramps, and facilities for paddlers are available. The stream's connection to the major Paraná River system is a notable geographical characteristic.