Embalse Lago Urugua-í is a reservoir in the province of Misiones, Argentina, formed by a dam on the Arroyo Urugua-í near the municipality of Puerto Libertad. Created for hydroelectric power generation, the lake is protected under provincial law as a Paisaje Protegido, a designation that covers the lake itself and a buffer zone extending 200 meters above the maximum reservoir elevation, encompassing roughly 4,250 hectares of native forest and plantations across 22 properties.

Kayaking is an established activity on the lake, with at least one commercial operator — Pristine Iguazú — offering guided kayak tours on the water. The lake has distinct sections; paddlers have explored what is referred to locally as the "espejo chico," a smaller arm or basin of the reservoir. Weather in the region can shift rapidly, and paddlers have encountered storms that arrived before groups could clear the water — a reminder that you should monitor conditions closely and plan conservative turnaround times.

Because the lake falls within a protected landscape, ranger patrols are active on the water, with enforcement focused on illegal fishing and the removal of illegal nets. Paddlers should be aware that the area is actively managed for conservation, and any applicable regulations regarding access or use should be confirmed with local authorities or the managing agency before launching. The surrounding landscape is characterized by Atlantic Forest vegetation, and the area is considered significant for biodiversity in Misiones.