Some mornings on the brow of Lookout Mountain, the Chattanooga Valley below is nothing but a white lake of fog, and the mowers go out anyway. Copeland Car and Lawn Care keeps yards along the mountain's sandstone shelf — mowing, trimming and edging on lawns that run right up to rock outcrops and hardwood roots. By the time the fog burns off the ridge and the valley comes back into view, the grass is cut, the walks are blown clean, and the line along the drive is drawn straight. Mountain yards ask for patience: thin soil, deep shade, slopes that fall away toward Lookout Creek. The rounds run through Lookout Mountain and down into Chattanooga Valley, Flintstone, Rossville and Fort Oglethorpe.