Hvítá, (“White river”) the biggest river in western Iceland, dividing the counties Borgarfjarðarsýsla and Mýrasýsla. Like other rivers of the same name, it is a glacial river, coming from the western foot of Eiríksjökull. Along with its tributary Norðurá, however, which is 117 km long and has its source at the north–eastern end of Langjökull. In 1648 a Dutchman built a salmon–fishing lodge by the mouth of the river.