The
Tárcoles River, also called the
Grande de Tárcoles River or the
Río Grande de Tarcoles, in
Costa Rica originates on the southern slopes of the
Cordillera Central volcanic range and flows in a south-westerly direction to the
Gulf of Nicoya. The river is 111 km long and its
watershed covers an area of 2,121 km
2, which encompasses around 50% of the country's population.