The Ishon Ren is one of the two great rivers flowing through the country of Narod Rada (the other one being the Ishderen). It is the western of the two streams, parting the Westlands from the rest of the country. It also is one of the main water sources for the north and the west of the country, as well as for the capital city Algaman.
The river springs up at an unknown location in the Thev Helmin, and then flows almost straight south towards the ocean. On this journey it passes by the human capital Algaman.
The most southern part is part of the Eteluunta Desert where the river divides into the Frost Delta. Here the water flows mostly underground, as the surface freezes due to the low temperatures. The top of the river still can be followed, however, and is oftentimes used for traffic routes on ice.