Autumn in North Adams sets the brick of the old mill blocks against a hillside going orange, and the light drops behind the ridge by four in the afternoon. North Adams Tree and Landscape LLC uses every hour of it — mowing and trimming while the season allows, borders edged clean, and fall cleanups that clear the leaves off lawns before the first snow buries the question. Spring brings the other cleanup, everything the winter shed raked out and carried away. In between comes the plowing: driveways opened, paths cut to the door, the steep approaches handled before the morning run down Route 8. A town built into a valley makes you good at working with slope, and that shows up in the finish.