The Housatonic begins up in these hills, and its west branch slips through Pittsfield so quietly that the backyards along it barely notice. Burgos Property Services LLC keeps those yards through the whole turn of the year -- mowing, trimming and edging while the grass is running, then plowing, shoveling and salting once the ground goes hard. Summer work is rhythm: a route, a schedule, clippings swept up before the truck pulls away. Winter work is response: up at odd hours, drives opened before anybody needs them. Both come down to the same thing, a property that is easy to live on in whatever weather the county sends.