Dugdemona River (duhj-duh-MO-nuh), c.85 mi/137 km long, N central La., rises in Lincoln parish, SW of Ruston, flows SE through Jackson-Bienville State Wildlife Area, joining Castor Creek to form Little R. just above Rochelle; 31°47'N 92°21'W. Forms boundary of Kisatchie Natl. Forest in S.