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The Edisto River is one of the longest free-flowing blackwater rivers in North America, flowing over 250 meandering miles from its sources in Saluda and Edgefield counties, to its Atlantic Ocean mouth at Edisto Beach, South Carolina. It rises in two main tributaries (North Fork & South Fork) from springs under the Sandhills region of West Central South Carolina, just to the south of the Piedmont Fall Line. It is the longest and largest river system completely contained within the borders of South Carolina. Its name comes from the Edisto subtribe of the Cusabo Indians.
The Dawhoo River (sometimes Dawho, or Dawhoe) connects the Edisto to the North Edisto River, also the confluence of the Wadmalaw and the Toogoodoo rivers, where they meet the Atlantic Ocean.
Between the coast and the Dawhoo River, the river is known as the South Edisto River.
