The Oak Ridges Moraine is Canada’s largest moraine. Created when a glacier retreated between 10000 and 12000 years ago, a massive 170 km long ridge, ranging in width from two to thirty km, was left behind.

The hills are composed of sandy and gravelly soil with the underlying till or boulder clay protruding in places to form high ridges. Where a large block of ice broke off the glacier, a hole would be left when it melted, forming a lake, pond or wetland.

There are numerous side trails throughout the area increasing the possibility of getting lost. Follow our maps and instructions carefully until improved trail markings are in place.

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