The Arroyo Saladillo Dulce is a waterway located in the Departamento San Justo, in the province of Santa Fe, Argentina. The surrounding landscape combines water, vegetation, and wildlife in a notably rich natural environment. The banks are characterized by monte (gallery woodland) and pajonal (reed and grass marsh) habitats, along with numerous aquatic environments and lagoons in the surrounding area.

Wildlife along the arroyo is diverse and conspicuous. Notable bird species include the collar duck (pato de collar), with visible plumage differences between male and female; the black-necked swan (cisne de cuello negro); flamingos (flamencos), identifiable by their long legs, long necks, and curved bills; gallaretas (coots); and saetas. Aquatic vegetation is a defining feature of the corridor, with camalotes (water hyacinth) producing showy flowers, and the amapola del agua (water poppy), a rooted floating herb with bright yellow flowers, coloring the water surface. Coipo (large semi-aquatic rodents, also known as nutria) have also been observed resting on grass platforms along the banks.

The overall character of paddling this arroyo is one of moving through a layered wetland environment where open water, dense aquatic plants, and riparian woodland alternate. The combination of lagunas and the arroyo itself offers varied paddling terrain within the same general area of San Justo department.