The creek watershed and associated waters is designated by the United States Geological Survey as sub-watershed HUC 031300010604, is named the Long Branch-Chestatee River sub-watershed, and drains an area of approximately 15 square miles southeast and south of Dahlonega. The sub-watershed has an unusual shape in the form of the capital letter U, with the right arm of the U being formed by Long Branch, and the left arm being formed by the Chestatee River south of its confluence with Yahoola Creek. The Chestatee also receives the waters of Cane Creek, Ralston Branch, Town Creek (not to be confused with Town Creek, the much longer tributary to the Chestatee River), and Bells Branch, along with 6 unnamed branches, before it departs the sub-watershed at its confluence with Long Creek.
