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 Eusian Sea. 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 Dakhota Hills, Savannah, Mannaseh Swamp, and the Pash Valley, before fragmenting into the Peshwar Delta and running out into the Eusian Sea.
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. More recently during conflicts between warring cities Mhaldor and Shallam over Jaru, Mhaldorian forces attempted to dam the river and flood the village.