The Niagara Escarpment Biosphere Reserve spans 725 km from Lake Ontario (near Niagara Falls) to the tip of the Bruce Peninsula (between Georgian Bay and Lake Huron). The escarpment was designated a World Biosphere Reserve in 1990 by the United Nations Educational, Scientific, and Cultural Organization (UNESCO) in recognition of its ecological significance. The escarpment runs through 2 significant biomes. To the north are boreal needle leaf forests, and to the south, there is temperate broadleaf forest.
Many people recognized the escarpment's significance before its World Biosphere designation. The work of some groups promoting awareness and conservation of the escarpment can be found in the following collections.