The source of the River Norðlingafljót is north of Langjökull glacier and runs from there about 70 km to the west into Hvítá. The river flows through a stunning landscape and some anglers consider it to be one of the most beautiful fishing rivers in Iceland. The environment is varied and the fishing areas are very diverse. Norðlingafljót runs on the famous Arnarvatnsheiði, which is without doubt one of the most productive trout fishing areas in the country. Many streams that flow from the lakes on Arnarvatnsheiði run into the river and both brown trout and Arctic char can be found. The average size of the fish is in the higher range. The biggest fish caught was 11 lbs. The general size of the brown trout is two up to six lbs and the Arctic char is often from two up to four lbs.