page_title: Mackinaw River
hierarchical_section_title: Mackinaw River
caption_attribution_description: English: Waltmire Bridge, located south of Tremont in Tazewell County, Illinois. The bridge carries a county road named Locust across the Mackinaw River. The bridge is oriented northeast-southwest; the river flows generally northwestward at this point. View in the photo is from the northwest, looking upstream.
context_page_description: The Mackinaw River is a 130-mile-long tributary of the Illinois River in the U.S. state of Illinois. Its watershed covers approximately 1,136 square miles, and contains some of the most productive agricultural land in the United States. The river itself maintains some of the highest quality streams in the state and provides habitat for 60-70 native fish species and 25-30 species of mussels. Its name, also spelled Mackinac, is derived from the Ojibwe word mikinaak meaning "turtle".
context_section_description: The Mackinaw River is a 130-mile-long (210 km)  tributary of the Illinois River in the U.S. state of Illinois. Its watershed covers approximately 1,136 square miles (3,000 km²), and contains some of the most productive agricultural land in the United States. The river itself maintains some of the highest quality streams in the state and provides habitat for 60-70 native fish species and 25-30 species of mussels. Its name, also spelled Mackinac, is derived from the Ojibwe word mikinaak meaning "turtle".
caption: Mackinaw River near Tremont, Illinois
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