Soča or Isonzo is a 138-kilometre long river that flows through western Slovenia and northeastern Italy. An Alpine river in character, its source lies in the Trenta Valley in the Julian Alps in northwestern Slovenia, at an elevation of 876 metres. The river runs past the towns of Bovec, Kobarid, Tolmin, Kanal ob Soči, Nova Gorica, and Gorizia, entering the Adriati…Soča or Isonzo is a 138-kilometre long river that flows through western Slovenia and northeastern Italy. An Alpine river in character, its source lies in the Trenta Valley in the Julian Alps in northwestern Slovenia, at an elevation of 876 metres. The river runs past the towns of Bovec, Kobarid, Tolmin, Kanal ob Soči, Nova Gorica, and Gorizia, entering the Adriatic Sea close to the town of Monfalcone. It has a nival-pluvial regime in its upper course and pluvial-nival in its lower course.