Pastillo River

Río Pastillo
Río Marueño
Río Pastillo during the dry season in Barrio Canas
Map showing the location of Río Pastillo among the other rivers in the municipality. The area in pink represents the urban zone of the city
Location of mouth
EtymologyBarrio Marueño
Location
CountryUnited States
TerritoryPuerto Rico
MunicipalityPonce
Physical characteristics
Source 
  locationBarrio Guaraguao, Ponce
  coordinates18°00′07″N 66°38′26″W / 18.0019106°N 66.6404508°W / 18.0019106; -66.6404508
  elevation435 feet (133 m)
Mouth 
  location
Rio Matilde
  elevation
15 feet (4.6 m)
Length19 kilometers (12 mi)
Basin features
ProgressionMarueño
Quebrada Limón
Canas
Canas Urbano
River systemRío Matilde
Tributaries 
  leftQuebrada Limon
Quebrada del Agua

Río Pastillo is a river in the municipality of Ponce, Puerto Rico. It is also known as Río Marueño in the area of the municipality where it runs through barrio Marueño. Together with Cañas River, Pastillo forms Matilde River. Pastillo is one of the 14 rivers in the municipality. The river originates at an altitude of 435 feet. Its tributaries are Quebrada Limon and Quebrada del Agua brooks and the river runs for 19 kilometers before feeding into Río Matilde at a height of 15 feet in Barrio Canas Urbano.