Mangart or Mangrt is a mountain in the Julian Alps, located on the border between Italy and Slovenia. With an elevation of 2,679 metres (8,789 ft), it is after Triglav and Škrlatica the third-highest peak in Slovenia. It was first ascended in 1794 by the naturalist Franz von Hohenwart. Mangart is also the name of the mountain range between the Koritnica Valley and the Mangart Valley, with the highest peak Veliki Mangart (Big Mount Mangart).
The road to the Mangart Pass (Slovene: Mangartsko sedlo; 2,072 metres or 6,798 feet) is the highest-lying road in Slovenia.The Mangart Pass Hut is located at the western foot of Mangart. There are two Fusine Lakes (Italian: Laghi di Fusine, Slovene: Belopeški jezeri) under Mangart's northern face.Mangart is a habitat for unique flora, including Geum reptans, Rurripa islandica, Trisetum spicatum, Festuca vivipara, and Artemisia genipi. It is also a nesting place of the Alpine Swift (Apus melba).