The Falling Waters Trail runs southwest out of Jackson toward Concord, and on a July evening the fields alongside it hold their heat until the sun is nearly down. Martin Lawn Care LLC keeps the yards on that side of the county in the same good order: even height, clean lines at the beds, clippings kept off the drive. Winter turns the work earlier and inward, plowing before dawn, a shovel where the blade cannot reach, salt on the pitch of a walk. The pleasure of it is the moment of stepping back, when a lawn looks intentional and a driveway looks as though nothing ever fell on it.