One of many rivers that flows through the continent of Sapience and surrounding islands, the Pachacacha River almost completely bisects the continent, flowing from its source in the Vashnar mountain range out to the Eastern Ocean. The river winds its way generally east and southeast through the continent, being joined by the smaller (though still significant) Urubamba River, and passing through the Savannah, Mannaseh Swamp, and the Pash Valley, before fragmenting into the Peshwar Delta and running out into the Eastern Ocean.
The river is of great strategic value, close to the great city of Shallam - and sister city Jaru - both which it supplies with fresh water. Recorded in the History of Mortal Races, this strategic value was exploited by Ashtani forces who attempted to sail up the river and attack Shallam, only to be repelled by the prepared Shallamese, who had been warned of the attack and had sunk ships in the mouth of the river to stop other ships from travelling up it. More recently during conflicts between warring cities Mhaldor and Shallam over Jaru, Mhaldorian forces dammed the river and succeeded in flooding the village.