The Río Chico de Nono is a roughly 30-kilometer stream flowing through the Traslasierra Valley in the Province of Córdoba, Argentina. It originates in the Pampa de Achala at an elevation of approximately 2,300 meters and descends to around 900 meters at its mouth, where it joins the Río de los Sauces near the base of the Cerros de Nono — a confluence locals refer to as "la juntura de los ríos." From there, the combined flow continues toward Dique la Viña.

The river's character is defined by its passage through large boulders and dense vegetation, which creates a series of natural pools well suited for swimming. The water is crystal clear. This contrasts with the neighboring Río de los Sauces, which is calmer, warmer, and shallower — the Río Chico de Nono has a more dynamic, rocky nature. The river does not maintain constant flow year-round, which is an important consideration for trip planning.

Two named natural swimming areas — Los Remansos and Paso de las Tropas — are located along the river, and multiple access points to the water exist, some with more services and others more remote. The river runs near the town of Nono, which offers hotels, rental houses, cabins, and two campgrounds, along with restaurants and other services. The surrounding area is a protected natural zone at the foot of the local hills.

A marked hiking circuit of approximately 7.79 kilometers departs from Plaza San Martín in Nono, follows the Río de los Sauces to the confluence, then continues along the Río Chico de Nono back to the starting point. This route passes a river ford (vado) at roughly the 7-kilometer mark and traverses terrain of sand and rock with some obstacles. The maximum elevation along this circuit is about 885 meters above sea level.

Paddling-specific access points, hazard assessments, and regulations are not well documented for this river. Prospective paddlers should consult the Nono tourism office directly for current conditions and access guidance.