The old railroad bed runs level along the Maury from Lexington down toward Buena Vista, and in October the whole corridor turns gold and copper above the water. Hernandez Painting and Landscaping LLC keeps lawns in that stretch of Rockbridge County — mowing through the long green months, trimming and edging, hauling off the leaf fall once the maples finally let go. Autumn in this valley arrives in a single cold night and then all at once. There is something plain and good about handing back a yard that is clear, level and ready for the frost. The mountains handle the rest.