Sanquianga National Natural Park, Protected area in Mosquera, Colombia.

Sanquianga National Natural Park covers 80,000 hectares of flat delta and estuary terrain in Nariño, between 0 and 20 metres above sea level. Its islands are formed by arms of the La Tola and Amarales rivers flowing into Amarales Bay, and its mangrove canopy reaches 40 to 50 metres. The park holds about 20% of Colombia's Pacific mangroves, with sandy beaches, swamp forest and flooded forest.

Sanquianga was declared a national natural park in 1977, covering about 80,000 hectares between 0 and 20 metres above sea level in Nariño. Its territory had been settled since 1851, when descendants of Africans enslaved from Guinea and Nigeria and brought to work alluvial gold along the Telembí settled the Pacific coast. In 1999 a citizen participation process began, leading to the 2003 Conversatorio de Acción Ciudadana in Tumaco on managing the piangua shellfish.

The park's territory is inhabited by Black communities of the Colombian Pacific, spread across 49 veredas whose productive activities are fishing, piangua gathering and subsistence farming. A citizen participation process begun in 1999 led to the Conversatorio de Acción Ciudadana in Tumaco in December 2003, where communities and authorities agreed on better management of the piangua (Anadara tuberculosa); the process won Colombia's National Wetlands Award.

Access is by motorboat: from Guapi the trip to Mulatos, where the park's operational base sits, takes about 1.5 hours; from Mosquera a boat reaches Mulatos with a change en route. Overland routes run Bogotá–Cali–Buenaventura, then boat to Guapi or El Charco (6 hours), or Cali–Tumaco (12 hours) and boat onward. The terrain is flat, between 0 and 20 m above sea level, hot and humid at around 27 °C.

The park holds more than half of Nariño region's mangroves and shelters hundreds of fish species in its waters. These mangrove forests also serve as crucial breeding and nursery grounds for marine life that extends well beyond the park's boundaries.