Simuay River
River in Bangsamoro Autonomous Region, Philippines
![Simuay River is located in Mindanao](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Philippines_relief_location_map_%28Mindanao%29.svg/240px-Philippines_relief_location_map_%28Mindanao%29.svg.png)
![Simuay River](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Red_pog.svg/8px-Red_pog.svg.png)
![Simuay River is located in Philippines](http://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Philippines_relief_location_map_%28square%29.svg/240px-Philippines_relief_location_map_%28square%29.svg.png)
![Simuay River](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Red_pog.svg/8px-Red_pog.svg.png)
The Simuay River is a river in the Philippines with its source at Lanao del Sur in the Piapayungan range, and its mouth at is at Illana Bay through the Mindanao River.
7°16′N 124°14′E / 7.267°N 124.233°E / 7.267; 124.233
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