Ontario is a plain, endless sky and endless plain, highlighted most notably by gullies, ravines and unassuming elevations, the most famous of which is the Niagara Escarpment. If we look for the highest peak in the Halton Hills, we will find ourselves at 414 metres, 1358 feet at the Churchill Community Church, just outside Acton.

From the small nearby Churchill church and the really beautiful cemetery you can see out into the flat landscape of the Halton Hills.
You will see farmland, farms, deciduous woodland. What you definitely won’t see are the scattered cedar or sedge swamps on the stone bedrock. Typical Halton Hills landscape.

The present-day appearance of the landscape of Halton Hills and all of Ontario is the result of glacial activity that took place during the Pleistocene (Quaternary) period, approximately 23,000 to 10,000 years ago.
When you stand at the highest point of the Halton Hills, you will have a bedrock underfoot of both shale, which was formed in the Ordovician in the First Mountains, and dolomite, which was formed a little later in the Silurian. The rocks are 485-442 million years old, remembering the first fish and the first Dryozoic flora, rocks on which trilobites moved in great numbers.

Of interest:
Churchill. The highest elevation in Halton Hills: 414 meters, 1358 feet
Dundalk has the highest elevation of any populated place in southern Ontario at 526m 1,735 feet.
Algonquin. Southern Ontario High Point. 578 meters, 1896 feet.
The Ishpatina Ridge is the highest point in Ontario. 693 m / 2275 feet.
Mount Logan (Yukon) is the highest mountain in Canada. 5,959 m / 19,551 feet.

More: Peakbagger