Kentucky Route 80 runs alongside the Russell Fork from Millard to just shy of the Virginia state line. There it turns northeasterly along the west bank of Grassy Creek, which lies inside Virginia and forms the line between Buchanan and Dickenson Counties, in order to avoid the deep gorge through Breaks Interstate Park. Route 80 soon crosses into Virginia, and continues to parallel Grassy Creek until the split with Hunts Creek, where it (and the county line) turns southeast to follow that creek. About halfway to the community of Breaks, SR 80 crosses the creek and county line.