In the First Section of the lower Paraná River delta, Buenos Aires residents have created a large number of small-scale private artificial river beaches for recreational purposes. The nourishment used in these beaches mitigates the existing distributary channel bank erosion phenomena caused by river floods, storm surges and motorboat waves. This contribution aims to analyse the distribution of these river beaches in the above mentioned section and examine the characteristics and evolution of a case study. To achieve this, existing beaches were mapped on Google Earth using a satellite image from 2021. Subsequently, a selected case study was located in a high-traffic area, near the continent, along the Sarmiento Channel (Timón Dorado Beach), where samples were taken for grain-size analysis and beach cross sections were surveyed with a total station on two different occasions within six months of each other. Additionally, a webcam was installed on a tower to photograph the Sarmiento Channel and its motorboat traffic. Results revealed a total of 401 beaches in the studied area, with a total area of 62,848 m 2. The case study monitoring confirmed that this nourished sand is fine and well sorted. The beach cross section evolves as sand flows upward from upper foreshore to a stable berm on the backshore and downward to the lower foreshore. In conclusion, recharge at least every 4 years is recommended to maintain the beach as a recreational space and as a bank protection.