Late September, and the aspen on the slope above Rainbow Lake turn over in a matter of days. What follows is leaf and needle across every lawn in Silverthorne, and Sparkle Mountain answers with rakes and mowers — the last cuts of the year, edges recut, beds cleared, the yard swept down to clean turf before the cold claims it. All summer those same yards get the weekly attention: mow, trim, edge, tidy, gone by lunch. There is something plainly satisfying about a lawn that has been finished rather than merely cut. The finish is exactly where the work shows.