El Rosario National Park (Spanish pronunciation: [el roˈsaɾjo]) is located in El Petén, Guatemala, on the eastern edge of the town of Sayaxché.

(16°31′38″N 90°09′36″W / 16.527163°N 90.160017°W / 16.527163; -90.160017 (El Rosario National Park)).

The park is named after laguna El Rosario, a small lake within its boundaries, and was formerly a state owned finca managed by the National Forestry Institute (INAB).

The park covers an area of 11.05 km2, including the El Rosario lake, which has a surface area of 4 ha in the dry season, though it is considerably larger during the rainy season.

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