Salto del Agrio is a waterfall located in the Neuquén province of Argentina. The waterfall is formed by the Agrio River, which flows through the Andes Mountains and plunges 80 meters (262 feet) into a narrow canyon. The name "Agrio" means "sour" in Spanish, and it is thought to refer to the high mineral content of the water in the river.

Salto del Agrio is part of the Copahue Provincial Park, which is known for its thermal springs, volcanic landscapes, and hiking trails. Visitors can access the waterfall via a short hiking trail that begins at a parking area near the town of Caviahue. The trail is well-maintained and offers scenic views of the surrounding mountains and forests. Swimming is not allowed in the pool beneath the waterfall due to strong currents and deep water.

The waterfall and surrounding area are popular destinations for tourists and outdoor enthusiasts who come to enjoy the natural beauty of the region. The park offers a range of recreational activities, including hiking, mountain biking, bird watching, and fishing. The nearby town of Caviahue also offers restaurants, accommodations, and other amenities for visitors.