Its sources are in the karst upland of Pandivere, in north-eastern Estonia, and its main tributaries join the river from the upland of Sakala. Due to its length, the river Pärnu passes through most of the landscape types found in Estonia.
Its origins are in the karst upland of Pandivere, in north-eastern Estonia, and its major tributaries converge into the river from the upland of Sakala. Due to its length, the Pärnu River traverses through most of the landscape types found in Estonia.