Wampus Pond turns the color of pewter in late October, and the maples above it drop everything within a single week — that is the hinge of the year in North Castle. Harter Landscaping of North Castle works both sides of it: mowing, trimming and edging through the green months, then leaf cleanups, then blades and shovels once the ground goes hard. Winter here means opening driveways off winding roads, clearing the plow-packed end of each one, taking walks and steps down to the surface, and treating the grades with salt or sand. Come April the cleanup runs go back through and the whole cycle turns over. It is steady, year-round care for one town and the roads that feed it.