The name is the geography. Chattanooga Valley lies in a long green trough with Lookout Mountain standing on one side and Missionary Ridge closing the other, and every yard here sits somewhere on that floor. Between the Ridges Outdoor Services mows, trims and edges those yards, knocks brush back off the property lines, mulches beds and carries leaves off before winter. In late August, when the kudzu makes its run at the tree line and the heat sits still down in the bottom, a mown lawn is the one thing on a place that looks decided. That is the part worth the sweat: the border cut sharp against the drive, a ragged edge pulled back into shape in an afternoon.