Arenillas, is a canton of the Province of El Oro, is located in the south-western part of Ecuador. Its capital is Arenillas, a city that has an approximate population of 30,000 inhabitants.
In this canton the month of March is the warmest month of the year its temperature is 26.8 ° C. In August which is the coldest month of the year the temperature is 23.9 ° C.
The Arenillas Ecological Reserve acts as a natural barrier, which prevents the Tumbesian desert from extending from Peru to Ecuador.
Eta area is home to deer, pamper foxes, lazy bears, bats, iguanas and a variety of birds, not forgetting that this reserve is home to 79 species that are part of its floristic composition.