The town of Lake St. Peter is a gateway to a lake and park of the same name. The park is on the southern edge of the Canadian Shield and the bedrock in the area contains many notable minerals.

The mixed forests of the Lake St. Peter area are typical of the Great Lakes-St. Lawrence lowland region, with a few boreal species more commonly found further north. Because of the logging activity and the forest fires of the late 19th and early 20th centuries, most of today's forest is immature second growth. Birch and white pine trees, which thrive on burnt lands, are plentiful.

Small mammals such as raccoons, chipmunks and squirrels are frequently seen in and near the campgrounds and it's not unusual to spot deer or moose on the hiking trails. The park is home to many species of birds including warbler, thrush, chickadee, woodpecker and great blue heron.