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Big Muddy River

Boat Ramps
1
Access Points
1
Species
42

The Big Muddy River is a lowland stream located in southwestern Illinois, flowing through multiple counties including Franklin, Jackson, Jefferson, Marion, Perry, Union, Washington, and Williamson. Named for its high silt content, the river is properly named as it historically carried and continues to transport great quantities of silt. The mainstem is approximately 156 miles long, joining the Mississippi River just south of Grand Tower. With a drainage area of about 6,182 square kilometers, the Big Muddy River features a diverse fish fauna with over 100 species. The river has a sluggish flow, a sinuous course over a broad floodplain, and predominantly mud/silt substrate. The waterway averages about 25 meters wide and 0.73 meters deep, with a predominantly pool habitat structure (about 60% pool areas) and limited riffle sections (only about 2%).


Species & education

Learn what type of fish are at Big Muddy River and what's needed to catch them.

Fishing spots, boat ramps & amenities

Learn how to get on Big Muddy River. Uncover great fishing access points, boat ramps, and all the facilities you need for an unforgettable day on the water. Some locations shown may border or include private property. Always check property boundaries and applicable regulations before visiting. onWater's Public & Private Land layer can help you plan your access with confidence.

Know where you can legally fish on Big Muddy River

See public and private land boundaries along the water, turn on private parcels with owner details to know where permission is required, and find land-trust parcels that offer permitted fishing access.

Illinois licenses and regulations

Take Big Muddy River with you

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    Download the map around Big Muddy River to use it offline when coverage drops.

  • Log your catches here

    Keep a private fishing journal for Big Muddy River to find where and when fish are biting for you.

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Water and weather conditions (10 day forecast)

See the best times to fish Big Muddy River and check the forecast before you go.

BIG MUDDY RIVER AT PLUMFIELD, IL

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