The Río Samborombón Chico is a relatively short river, approximately 15 kilometers long, located in Buenos Aires Province, Argentina. It is one of the smaller rivers in South America and ultimately empties into Samborombón Bay, a large bay on the coast of the Río de la Plata. The river's course runs through the region near the town of Don Torcuato, with one known trailhead for a hiking path starting on Provincial Route 20 (RP20) and following the river. For paddlers, specific access points, boat ramps, and facilities are listed. The river's character is defined by its connection to the expansive, shallow Samborombón Bay, which begins about 160 kilometers from the mouth of the Río de la Plata. This suggests the lower reaches of the river may be influenced by tidal flows and have a coastal wetland environment. There is no specific information regarding water temperature patterns, water quality, notable hazards, seasonal recommendations, or any paddling restrictions. The area's proximity to Samborombón Bay indicates potential for observing coastal birdlife and other wildlife associated with the bay's ecosystems. The river does not appear to have a significant historical or cultural narrative beyond its geographical role.