Estero Piduco, also commonly referred to as Canal Piduco, is a watercourse smaller than a river that runs through the city of Talca in the Maule Region of Chile. It originates near Huilquilemu from the convergence of various irrigation canals and follows a zigzag course through rural areas before entering Talca from the southeast. From there it cuts diagonally across the city in a northwest direction, ultimately emptying into the Río Claro de Talca. The subsubcuenca it drains covers approximately 31,133 hectares, falling entirely within the Maule Region, with the communes of San Clemente, Talca, and Maule accounting for the bulk of that area.

The waterway passes through an urban environment for a significant portion of its course, and portions of it have historically been vaulted over during its passage through the city. In 2020, the municipality of Talca explored developing a kayak circuit along the estero as a local tourism initiative. The route evaluated at that time began at the eastern end of Parque Piduco at Ruta 5 Sur and extended to the bridge at calle 6 Oriente, a stretch that took approximately one hour to paddle. The stated goal was to combine recreational paddling with environmental awareness within the city itself.

Paddlers considering this waterway should be aware that it is an urban canal with origins in irrigation infrastructure rather than a natural river channel, which will shape the character of any paddling experience here. No formal paddling regulations, established access infrastructure, or water quality data have been documented.