Matamuhuri River  a river that originates at 21°14ŽN and 92°36ŽE, only 1° to the north and 1° to the east of the source of the sangu river in the ranges of hills that divide Arakan from Chittagong. Matamuhuri is the Bangla version of the Magh name Mamuri. Like the Sangu, this river also flows northwest in the Hill Tracts and enters Cox's Bazar district from the east. Flowing west it falls into the bay of bengal at 21°45ŽN and 91°57ŽE forming a broad delta at its mouth extending from Bhola Khal to Khuta Khali. The delta is of the same character as the Sundarban, consisting of groups of islets intersected by a network of tidal creeks and covered by mangrove vegetation. The entire area has been brought under cultivation by erecting embankments. The principal upazila adjoining this river is Chakaria. The length of the river is about 287 km. [Sifatul Quader Chowdhury]

See map in chittagong region river system.