The Oak Ridges Moraine runs east-west through the centre of York Region.  Virtually all the land south of the Moraine is urbanized. To the west, the valleys of the Humber River act as major contraints in northern Vaughan, while the heavily rural Township of King has maintained several large blocks of forest and signficant wetland.  

There are a number of large swamp wetlands associated with the major creek systems that drain northward to Lake Simcoe, including the Holland River, Black River, and Pefferlaw Brook.  

For a high resolution PDF of the map, go to Associated Documents below.

For more information on The State of Greenlands Protection in South-Central Ontario click here.