Montgrí, Medes Islands and Baix Ter Natural Park (Catalan: Parc Natural del Montgrí, les illes Medes i el Baix Ter) is a natural park located in the province of Girona, Catalonia, Spain. The park was established in 2010 and encompasses the Medes Islands, the Montgrí Massif and the mouth of the Ter river, covering a land area of 6155.20ha and a marine protected area of 2036.99ha. It stretches over the municipalities of L'Escala, Torroella de Montgrí, Pals, Bellcaire d'Empordà, Palau-sator, Ullà, Fontanilles and Gualta.