Coquille River Falls is a two-tier waterfall in southwestern Oregon at the northern edge of the Rogue River–Siskiyou National Forest, east of Port Orford. Reached at the Coquille River Falls trailhead where the South Fork Coquille River meets Sru Creek and Drowned Out Creek, it drops 115 feet in two stages over a continuous rocky cliff in a rugged canyon. The exposed bedrock comes from sedimentary deposits of the Eocene-age Tyee Formation. The name Coquille may come from the Chinook Jargon word "Scoquel" for lamprey eels, and in the mid-1800s fur traders applied it to both the region’s Native people and the river. The surrounding 500-acre canyonlands, protected since 1945, are also valued for ecological research centered on Port Orford cedar.