Nature Reserve Class Parks focus on the protection of rare or significant natural features. These parks are established to conserve important ecological or geological areas such as old-growth forests, rare plant habitats, or glacial landforms. Public access is limited, and recreation is generally not a primary goal. When permitted, activities are low-impact—such as research, photography, or guided walks. Infrastructure is minimal or nonexistent to reduce disturbance. These parks play a vital role in scientific study and biodiversity conservation. They are key to protecting Ontario’s most sensitive natural areas and maintaining ecological integrity across the provincial park system.