The Marbel River, also known as the Marbol River and the Sulphur River, is a river in the province of

Cotabato Cotabato, formerly and still commonly referred to as North Cotabato and officially the Province of Cotabato, is a landlocked Provinces of the Philippines, province in the Philippines located in the Soccsksargen Regions of the Philippines, regi ...

in the

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

. It is located at the foot of

Mount Apo Mount Apo is the highest mountain peak in the Philippines, with an elevation of above sea level. A large solfataric, dormant stratovolcano, it is part of the Apo-Talomo Mountain Range of Mindanao island. Apo is situated on the tripartite b ...

and drains its northwest flank. The Marble River connects to the Kabacan River in Cotabato, a

tributary A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they ...

of the Pulangi River which empties into the

Rio Grande de Mindanao The Rio Grande de Mindanao, also known as the Mindanao River, is the second-largest river system in the Philippines. Located on the southern island of Mindanao, with a total drainage area of , draining the majority of the central and eastern po ...

Cotabato City Cotabato City, officially the City of Cotabato (Maguindanao language, Maguindanaon: ''Kuta nu Kutawatu'', Jawi alphabet, Jawi: ; Cebuano language, Cebuano: ''Dakbayan sa Cotabato''; ), is a Cities of the Philippines#Legal classification, inde ...

References

Landforms of Cotabato Rivers of the Philippines {{Philippines-river-stub