|Mablung||260 miles||Monwuil Twine|
|Monwuil Twine||250 miles||Maegorion|
|Phasirnat||80 miles||Primordial Storm|
|Primordial Storm||30 miles||Kennel|
|Region||High Wood Country, Tribe Steppes, Northern Hordelands, Lands of Purity|
Anassúmë is a fast-flowing river with headwaters on the southern tip of the steamy Baurongor lake. After passing through the deep forests of the Hight Wood Country, it picks up speed and width in the Tribe Steppes. In this region, after the Monwuil Twine, it widens to one mile across as it flows south through the Tamoroc plain. The river is often flooding as it passes the area of the Primordial Storm. As it moves deeper into the Northern Hordelands the river cuts a deep canyon as it passes through the Storsalds and into the Lands of Purity. The river empties into Galathien.
Due to the presence of the rift Primordial Storm, the Anassúmë is inhabited by water archons and other creatures not native to this realm. These creatures mostly keep to that part of the river that passes the rift.
The river is less than a mile across for much of its length, yet very deep. In some places, the waters are so deep that light does not reach the bottom. Where the Anassúmë meets the small river Mutt Drool are caves descending deep into the Underdark. In times of heavy flooding, water gushes down these then over ledges overlooking the drow city Filion'lyr.