The Rīva River has been a border between territories in historical terms. During the Curonian era, the ancient land of Piemare bordered with Bandava at the place where the Rīva River inflows in the North. Although you will not find a sign pointing to the trail alongside the highway, it is easy to find. Follow markings to the Ulmale-Labrags Lutheran Church, where you will find the start of the trail marked with a special sign. The route will take you away from the sea and wind up and down the beautiful ancient valley of the lower reaches of the river. The Rīva flows in a canyon-type ditch which is as much as 12 m deep. You will see endless curves and cliffs. There will be colourful views of nature and of the diversity of flora. If you luck out, you will spot a kingfisher or a black stork. The river is more appropriate for kayaking during the spring and the autumn.