Near the ocean, the North Fork of the Edisto River forms the northeastern boundary to the ACE Basin.  The river begins as the Edisto River North Fork and South Fork before merging into the Edisto Mainstem near Branchville, SC.

The map shows nearly 200 boat landings in what is generally considered the Lowcountry of South Carolina.  Other maps show the Midland and the Blue Ridge/Piedmont areas of the state.