Corbett Creek Marsh is a coastal wetland at the Town of Whitby in Durham Region with a wetland size of 7 ha. The wetland of Corbett Creek Marsh is periodically closed off from the Lake Ontario as water levels may differ from the lake by up to one metre. The marsh is adjacent to the Waterfront Trail. publications.gc.ca/collections/collection_2012/ec/En164-23-2011-eng.pdf