Dique Punta Negra, also known as the Zonda Dam, is a reservoir on the Río San Juan in the department of Zonda, San Juan province, Argentina. Inaugurated in 2015, it forms part of the "Ruta Interlagos," a circuit of more than 100 kilometers through mountain terrain that also includes the Dique de Ullum. The reservoir is one of the primary tourist destinations in the San Juan summer season and serves a dual purpose as a hydroelectric facility supplying power to the provincial capital and the department of Zonda.

The water is calm with no waves or significant currents, making it well suited for flatwater paddling disciplines. Kayaking and stand-up paddleboarding are both well-established activities here, with rental equipment and guided tours available at the pier. Kayak rentals are offered in single or double configurations, priced per person. SUP lessons are also available for beginners, with instructors meeting participants at the dock. The guided kayak tour covers the reservoir and includes information about the dam's history and infrastructure. Sessions for both kayak and SUP typically run one hour. Catamaran excursions and pedal boats are additional on-water options that share the same waters, so paddlers should be aware of mixed-use traffic.

The main access point is the embarcadero (jetty) at Punta Negra. For those without a private vehicle, public bus line 162 of the RedTulum network operates daily service from the city of San Juan, departing from Estación Córdoba on weekdays at 8:50, 13:35, and 17:30, with the journey taking approximately one hour and fifteen minutes. The route to the reservoir is recently improved.

Two beaches are designated and supervised by lifeguards during the summer season, with a buoyed swimming zone separate from the navigation area. Navigation hours run from 8:30 to 19:00, and the bathing area is open from 8:00 to 20:00. The surrounding landscape is defined by the foothills and mountains that border the Río San Juan valley. Sanitation facilities at the site can be poorly maintained, which is worth factoring into trip planning. Gastronomic options are available on-site. The reservoir is most heavily visited during the Argentine summer (December through March).