Back Branch (Deep River tributary)Back Branch is a long 2nd order tributary to the Deep River in Randolph, North Carolina.CourseBack Branch rises on the Broad Mouth Branch divide about 2 miles northeast of Coleridge, North Carolina in Randolph County, North Carolina and then flows southwesterly to join the Deep River about 0.25 miles north of Coleridge, North Carolina.WatershedBack Branch drains of area, receives about 47.3 in/year of precipitation, and has a wetness index of 388.39 and is about 52% forested.