Saint-Louis Mission National Historic Site lies on a tableland beside the Hogg River, 3 kilometres inland from Georgian Bay, near Victoria Harbour, Ontario. This 2-hectare archaeological site was an open field when it was investigated in the first half of the 20th century. Since that time the field has been left fallow, while part of the site area has grown into a mixed hardwood forest and the rest has been planted with pine trees. There are mounds and surface depressions indicative of past archaeological investigations. Official recognition refers to the limits of the village and mission as defined by the palisade on the south and west sides, and by the riverbanks on the east and north sides.