Sibalom River

Sibalom River is the longest river in the province of Antique in Panay island Philippines. With a total length of and a drainage basin covering , it is the largest river system in Antique and fourth longest in Panay after Panay River, Jalaur River, and Aklan River. It is located in Sibalom and San Remigio. Along with its main tributaries Mao-it River and Tipulu-an River, it forms the Tipulu-an and Mao-it River Watershed Forest Reserve (now known as Sibalom Natural Park) which was proclaimed a natural park on 23 April 2000.
Sibalom River has four main tributaries by length, Tipulu-an River 33 km, Maninila River 31 km, Mao-it River 15.8 km and Cansilayan River 12.5 km. The river's watershed is considered as one of the last remaining lowland rainforests on Panay.
Tributaries.
List of Sibalom River tributaries by length.
1.Tipulu-an River - 33 km (20.5 miles)
2.Maninila River - 31 km (19.2 miles) 
3.Mao-it River - 15.8 km (9.8 miles) 
4.Cansilayan River - 12.5 km (7.7 miles)