The community of Foymount (along the former Highway 512, the Opeongo Line) is one of the highest settlements in Southern Ontario.

The Opeongo Hills are a continuation of the Laurentian Highlands, which extend into Eastern Ontario, towards Gananoque, and across the Ottawa River Valley into Quebec, and the Laurentian Mountains, which continue parallel to the St. Lawrence River, north of Montreal, Trois-Rivières and Quebec City.

The geography in this area of Central Ontario is dotted with rolling hills and forests with streams, lakes, and small waterfalls, typical of a place in the Canadian Shield.

The soils of the area were not perfectly suited for farming, but small-scale agriculture was able to be conducted on the land.

Today, the Opeongo Hills are crossed by many provincial highways, many of which still follow the original Historic Colonization Roads.