Rear Brook is a small fresh water tributary that begins on the west side of the community of Abercrombie, in a landscape shaped by mixed forest, rural settlement, and the legacy of Pictou County’s early industrial development. From its headwaters, the brook flows eastward into the East River, one of the county’s major waterways and the river that anchors the towns of New Glasgow, Stellarton, and Trenton. Its course is modest in length, but like many small tributaries in the region, it plays a role in local drainage, wildlife habitat, and the overall health of the East River watershed.