Summer arrives in Ossining as a long bright weight coming off the Hudson, and the village hills hold onto it all afternoon. This is where Ossining Lawnmower Services does its lawn care — mowing the sloped yards that step down toward Louis Engel Waterfront Park, trimming close along stone walls and fence lines, edging until every border reads clean from the sidewalk. There is a real satisfaction in the last pass of the day, the stripes lying straight down a hill that never wanted to be straight. Come December the work turns to snow removal, plowing driveways and clearing walks on streets far too steep to wait on a thaw. Ossining and the towns around it — Briarcliff Manor, Scarborough, Croton-on-Hudson, Sleepy Hollow — are where all of it happens.