Grindstone Creek

The Greenbelt protection has extended to 21 major urban river valleys and 7 coastal wetlands across the Greater Golden Horseshoe - including the Grindstone Creek! 

The addition of these waterways to the Greenbelt is an important recognition of the vital role the Greenbelt plays in protecting the hydrological features we rely on for clean drinking water, flood protection, and healthy ecosystems.

Grindstone Creek is a stream in the Greater Toronto and Hamilton Area, Ontario, Canada. It is in the Great Lakes Basin and is a tributary of Lake Ontario at the western end of the lake. Every 5 years Conservation Halton releases a report card to assess the health of the Grindstone Creek watershed. Grades around urbanized areas typically decline because of reduced natural vegetation and hard surfaces, such as roads and roofs. Protecting the urban river valleys is very important for our communities health. 

Top facts about the Grindstone Creek:


The Grindstone Creek watershed consists of approximately 28% forest cover. A portion of this forest falls within the Carolinian Forest zone, which reaches its northern limit in this region of Southern Ontario.


The fish community within the Grindstone Creek watershed is varied with approximately 78 different species of fish recorded since the early 1900’s.


There are various amazing hikes you can take while visiting the Grindstone Creek watershed.


Grindstone Creek is home to the Grindstone Waterfall which is considered a major tourist attraction while visiting the area.


Grindstone Creek drains an area of 90 square kilometres, making it one of the main tributaries discharging into the northwest-end of Hamilton Harbour.

Want to learn more?

Right now, we are working with community groups, municipalities and organizations across the Greenbelt to ensure the urban river valleys and the Greenbelt remain healthy for generations to come.

The Conservation Halton has produced extensive research about the Grindstone Creek.

The Conservation Halton organizes many events to help you learn more about the watershed, or you could check-out our events page.