By late October the cottonwoods along the Littleton line have gone full gold and are letting go of all of it at once. Walter's Lawn Service spends those weeks on leaves, clearing lawns down to green again before the ground freezes and the snow packs everything flat. The rest of the year it is mowing, edging and string trimming on a schedule you could set a Saturday by. There is something plain and direct about a name on the side of a truck; it means somebody is accountable for the straight line along your walk. Highlands Ranch yards show it when a person keeps at them, week in and week out.