Lake Ontario Waterfront

Toronto and Region Conservation Authority (TRCA) has jurisdiction over 72 kilometres of Lake Ontario waterfront. We are committed to preserving and enhancing the health and beauty of this entire shoreline.


Updated: August 26, 2020

Toronto and Region Conservation Authority (TRCA) is warning of landslides, bluff collapse, and falling debris along the Scarborough Bluffs.

Erosion and slope instability along the trails and edges of the Bluffs make them unstable and prone to collapse at any point. Recently, major bluff failures have occurred near the west side of Bluffers Park, in particular the area of shoreline associated with Scarborough Crescent Park. Minor bluff failures have also occurred on the east side of Bluffers, around the shoreline associated with Cudia Park.

TRCA cautions members of the public who walk along or up/down the Scarborough Bluffs and shoreline, not only in the active areas of bluff failures but all along the shoreline, trails (formal and informal), and edges of the Scarborough Bluffs.

Barriers have been placed in areas where access is strictly prohibited. Please respect all barriers and signage in the area for your safety.

TRCA’s area of jurisdiction on the waterfront extends from the City of Toronto/City of Mississauga border in the west to the Town of Ajax/Town of Whitby border in the east.

Across this shoreline, nine watersheds drain into Lake Ontario: Etobicoke Creek, Mimico Creek, Humber River, Don River, Highland Creek, Rouge River, Duffins Creek, Petticoat Creek, and Carruthers Creek.

mouth of Mimico Creek
The mouth of Mimico Creek.

The sediment that makes up the Toronto Region shoreline is generally a mixture of sands, silts, clays, tills, and gravels, all of which are highly erodible. As a result, the shoreline has been — and continues to be — modified by wave action, ground water conditions, wind erosion and numerous other factors. Serious loss of property and threats to homes, roads and services can and have occurred as a result of these processes.

TRCA works to maintain shoreline protection and restore terrestrial and aquatic habit along the shoreline,  while providing recreational opportunities through the design and construction of waterfront parks. Integrated shoreline management is essential to efforts to achieve a waterfront that is clean, green, accessible, diverse and attractive.