The Olgara River is the largest river in eastern Corwyn. It is sometimes called the "Yellow River" by the Daroon.
The Olgara flows southeast from its origin in the Saugreth-Muir, and flows steadily past the enormous forest of the Direwood until it reaches the vast Vakara Grasslands, where it branches into the smaller rivers of Vhann and Zorath.
This river also serves as the border between the realms of Kurand and Drakhara as its flows south of the vast Direwood forest, where the river path lies in huge ravines with towering cliffs on either side. This forbidding geography has always served as a strong barrier between the cultures of the East and Far East.
Further, north, The Olgara River also separates the realm of Drakhara from the Khorlann Steppes region of East Corwyn.