The Boagrius or Boagrios (Ancient Greek: Βοάγριος), also called Manes (Μάνης), was the largest river of Locris. It was only a mountain torrent, rising in Mount Cnemis, and flowing into the sea between Scarpheia and Thronium. The river was often dry.[1] The town of Tarphe was also upon its banks. The river is mentioned by Homer in the Iliad.[2] The river significantly changed course following the Locrian earthquake of 426 BCE.[3] It is noted by Strabo,[1] Ptolemy,[4] and Pliny the Elder.[5]