The Río San Juan in San Juan province, Argentina, is a whitewater destination used for kayaking, with the Aguas Blancas Park serving as the primary venue for both national and international competitions. The river flows through a mountainous landscape and is recognized as a legitimate competitive paddling site, which speaks to the quality and consistency of its whitewater features. The dykes along the river produce waves that are well-suited to freestyle kayaking and slalom disciplines.

The main paddling disciplines practiced here are aguas blancas (whitewater), freestyle kayak, and slalom or canoe sprint. Given the technical nature of the water, paddlers are required to be accompanied by a guide and must use appropriate technical equipment. All navigation on the river is subject to prevailing weather conditions, so flexibility in scheduling is advisable.

The surrounding environment is defined by mountain terrain under characteristically sunny skies, which is typical of the arid Cuyo region of western Argentina. The area around San Juan city sits at the foot of the Andes, and the river corridor reflects that high-desert mountain character.

Because a guide is mandatory, independent paddling without local support does not appear to be the standard practice here. Paddlers planning a visit should arrange guided trips in advance through local operators or the provincial tourism infrastructure, which is coordinated through the Secretaría de Turismo de San Juan.