A river in Phthia.
The Spercheios river flowed through Phthia, the domain of King Peleus and Achilles. The river-god Spercheios mated with Polydore, daughter of Peleus—a son named Menesthios was the result of that union. Menesthios led one of Achilles's Myrmidon1 battalions at Troy.
During the Trojan War, Lamenting the death of his companion Patroklos, Achilles spoke aloud as if the river-god Spercheios could hear him. He said he was cutting off his hair for the funeral pyre of Patroklos and would not be able to fulfill his father's vow to cut his hair and sacrifice fifty rams for Spercheios when he returned home.
1. Myrmidons—the subjects of King Peleus and Achilles were referred to as Myrmidons, Hellenes, and Achaians.
| References: Homer, Iliad book 16, lines 174, 176; book 23, lines 142, 144 |