The Gin Ganga (Sinhala: ගිං ගඟ, Gin River), is a 115.9 km (72 mi) long river situated in Galle District of Sri Lanka. The river's headwaters are located in the Gongala Mountain range, near Deniyaya, bordering the Sinharaja Forest Reserve. The river flows past the villages of Baddegama, Nagoda, Thelikada and Hegoda. The Wakwella Bridge, which was the longest bridge in Sri Lanka, is built over this river. The river is also dammed at the Thelikada. The mouth of the river is at Gintota, just north of Galle.