Mississippi River (Ontario)
The Mississippi River is a tributary of the Ottawa River, approximately 160 km (100 mi) long, in southern Ontario in Canada. It rises east of the Kawartha Lakes and flows northeast through Mississippi Lake, past Carleton Place, through Mississippi Mills (formerly, Almonte), then north to join the Ottawa near Arnprior.Tributaries include the:
- Clyde River
- Indian River
The Purdon Conservation Area, a wetland in this river's watershed, contains Canada's largest native colony of Showy lady slipper orchids, some 16,000 plants.