The Rouge River is a river in Markham, Pickering, Richmond Hill and Toronto in the Greater Toronto Area of Ontario, Canada. The river flows from the Oak Ridges Moraine to Lake Ontario at the eastern border of Toronto, and is the location of Rouge Park, the only national park in Canada within a municipality. At its southern end, the Rouge River is the boundary between Toronto and southwestern Pickering in the Regional Municipality of Durham.WatershedThe Rouge River begins in the Oak Ridges Moraine in Richmond Hill and flows past: Markham, northwest, central, to south, including a couple of conservation areas, the eastern edge of Scarborough and Rouge Valley Park.The watershed of the Rouge River is located in the municipalities of Richmond Hill and Markham in the Regional Municipality of York; Pickering in the Regional Municipality of Durham; and Toronto. Tributaries of the Rouge River also extend into the municipalities of Aurora and Whitchurch-Stouffville in the Regional Municipality of York. The total area of the watershed is 336km2, of which 40% is agricultural land, 35% urban, 24% forest/wetland/meadow and 1% watercourses/waterbodies.
