The Rio Paraíba do Sul in the state of Rio de Janeiro offers a well-established rafting corridor near the city of Três Rios, where the river meets the Paraibuna and Piabanha rivers in a confluence described as the only triple river meeting point of its kind in Latin America. This geographical feature marks the downstream terminus of the primary commercial rafting section and provides a distinctive endpoint to the run.

The standard rafting route covers approximately 12 kilometers and takes around three hours to complete. Rapids along this stretch range from Class I to Class III+, with calmer sections interspersed throughout, allowing paddlers to swim or float between more technical passages. The mix of difficulty levels makes the section accessible to beginners while still offering enough challenge for experienced paddlers. Commercial operations run year-round, with the river maintaining paddleable flows across seasons.

The surrounding landscape is characterized by Atlantic Forest vegetation, with views of mountains and rural terrain along the corridor. The base facility used by commercial operators is located within a protected reservation area near the confluence and includes a restaurant, restrooms, a bar, parking, and a swimming pool. The reservation setting means a variety of wildlife is present in the area.

Commercial operators require participants to be at least 14 years old and provide standard equipment including rafts, helmets, paddles, and life vests. Guides on organized trips hold certification from the International Rafting Federation (IRF). Paddlers are advised to bring old shoes suitable for water use, a towel, extra clothing, sun protection, and a cap for sunny conditions.