The Río San Juan, in the province of San Juan, Argentina, is a whitewater paddling destination set against a backdrop of mountain terrain and characteristically clear, sunny skies. The river supports several kayaking disciplines, including whitewater (Aguas Blancas), freestyle kayak, and slalom or canoe racing. Its conditions are suitable for competitive paddling, and the Aguas Blancas Park section of the river has been used as a venue for both national and international competitions in these disciplines.

Paddling on the Río San Juan requires the accompaniment of a certified guide and the use of appropriate technical equipment. All river navigation is subject to prevailing weather and water conditions, which should be confirmed before any trip. Given the whitewater character of the river and the mandatory guide requirement, this is not a destination suited to casual or inexperienced paddlers without proper preparation and local support.

Paddlers planning a trip should contact the Secretaría de Turismo de San Juan directly for current logistical details regarding access points, seasonal water levels, hazards, and facilities, and to arrange guided outings through local operators familiar with the river.