Both the mouth of the Atran and which sea flow into Kattegat?
Ätran (river) Ätran is a Swedish river. The river is about 240 km long, and has its source in Gullered, Västergötland, at a height of 332 m above sea level. The river has its mouth in Falkenberg, Halland, where the river enters Kattegat.
Unalakleet River The Unalakleet River in the U.S. state of Alaska flows southwest 90 mi from the Kaltag Mountains to near the town of Unalakleet, on Norton Sound of the Bering Sea.