The River Ruin flowed out of the peaks of the World Pillar Mountains within the Ghost Leopard province of the Yikarian Empire, cascading north and west into the Sun's Eye province before passing the Blackwash Fens and emptying into the Great Sea at Pearl Bay. The river stretched for approximately 300 mi (480 km).
Due to the harsh arid environment, the river only flowed for six months out of the year. However, heavy rainfall and spring runoff from the mountains filled the dry river bed with turbulent water during the rainy season.
The yikarians used the river to transport goods from the mountains to the coast. During the dry season, caravans used the river bed as a road to move slaves and other cargo from the coast deep into the Yikarian Empire.
- Blackwash Fens