Princeton Ridge keeps its own rules: diabase boulders shoulder up through the turf along Mount Lucas Road, and a lawn there is something you earn rather than inherit. A&B Sanchez Landscaping works that stubborn ground all summer, with mowing, trimming and cleanups shaped around stone the glacier left behind. Come winter the ridge takes a storm first and lets it go last, so the plow runs early and a driveway is open while the rest of the road is still white. There is a plain satisfaction in a walk cleared down to the pavement and a lawn cut in even lines across uneven land. Princeton, and the roads that climb out of it toward Montgomery, is the whole of the map.