The Delta de la Dranse National Nature Reserve is a nature reserve located in the delta of the Dranse river. The reserve is located to the east of the commune of Thonon-les-Bains in southeastern France. At 1.5 km long by 500 m wide, it covers a small area of 53 ha at an elevation ranging from 372 to 380 m. Offering a rich botanic biodiversity, the site was declared a national nature reserve in January 1980 and declared a special "zone of protection" since September 1986. The beach of the last river delta along Lake Geneva is constituted of alluvium, sand, stones, and pebbles. The sandy beaches and small islands are constantly being formed by the path of the rising torrential river, which has resulted in the expansion of a rich diversity of flora and wildlife. The reserve shelters:

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