The Río La Leona is a river in the Patagonian province of Santa Cruz, Argentina, offering a popular full-day adventure combining kayaking and trekking. The primary access point for paddlers is via organized tours originating from the nearby tourist hub of El Calafate. These tours typically transport participants to a starting point on the river, with Estancia La Estela mentioned as a trailhead. The standard paddling route covers approximately 14 kilometers of the river, with one tour operator specifying the first kayaking leg is about 8 to 10 kilometers long, taking roughly one hour to one hour and fifteen minutes. The river is characterized by a mix of small rapids and calm stretches, providing an easy to moderate kayaking experience suitable for a range of skill levels. The water is glacial in origin, flowing through a landscape of plains and open skies, with views of features like Cerro Fortaleza near Estancia La Meseta. The river eventually flows into Lake Viedma. The overall experience is structured as a full-day excursion, with kayaking complemented by a guided hiking segment, often around 5 kilometers in length. This activity is strictly seasonal, operating only from October through April, aligning with the Patagonian summer and early autumn. No specific water temperature data, water quality issues, or paddling regulations are detailed, which focuses on commercial tour offerings. The river's aesthetic is defined by its remote Patagonian setting, framed by plains and dramatic skies.