Horse Trough Falls is a popular 75-foot waterfall on an unnamed tributary of the Chattahoochee River in Chattahoochee National Forest near Helen, Georgia. Directions: Take GA 75 north from Helen Georgia for eight miles to Unicoi Gap. Turn left onto Forest Service Road 44 (Wilkes Creek Road). Go 5.4 miles to a sharp curve, and take the right fork. Go 0.2 mile toward the stream and follow colored blazes on the trees.