August afternoons out along Route 3 build thunder over the hills by three o'clock, which means the mowing gets done in the morning and the trimming finishes ahead of the rain. Matty's Adirondack services L.L.C. keeps yards and camp lots between Bloomingdale and Saranac Lake — cutting grass on a steady round, trimming around stumps, posts and outbuildings, edging drives, and clearing brush, needles and leaves when the season turns. Half the properties up here sit empty part of the year, so someone has to be the one who notices the grass got away and the path disappeared under raspberry canes. Getting a place back to sharp before the owners pull in is its own reward. Then the maples go, the whole valley turns, and it is cleanup weather until the ground freezes.