Thornapple River

Boat Ramps: 4
Access Points: 4
Species: 32

The Thornapple River is a major tributary of the Grand River in Michigan, flowing approximately 78 miles from its headwaters in northeastern Eaton County westerly to the village of Middleville in northwest Barry County, then north to its confluence with the Grand River near Ada in Kent County. Known for its diverse fishery and scenic beauty, the Thornapple offers anglers various fishing opportunities across a variety of habitats—from fast-moving sections near dams to peaceful backwaters with abundant structure. The river drains approximately 422,545 acres across five counties: Eaton, Barry, Kent, Ionia, and Allegan, with the watershed being primarily agricultural (52%) and forested (39%). Five hydroelectric dams divide the river into distinct sections, each with its own characteristics and fishing opportunities.

Michigan licenses and regulations4 to check before you go

Species & education

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

Find which waters have the species you want to catch

Largemouth Bass

Micropterus salmoides

Smallmouth Bass

Micropterus dolomieu

Rainbow Trout

Oncorhynchus mykiss

Brown Trout

Salmo trutta

Brook Trout

Salvelinus fontinalis

Northern Pike

Esox lucius

Muskellunge

Esox masquinongy

Walleye

Sander vitreus

Black Crappie

Pomoxis nigromaculatus

Black Bullhead

Ameiurus melas

Black Redhorse

Moxostoma duquesnei

Bluegill Sunfish

Lepomis macrochirus

Brown Bullhead

Ameiurus nebulosus

Channel Catfish

Ictalurus punctatus

Common Carp

Cyprinus carpio

Golden Redhorse

Moxostoma erythrurum

Green Sunfish

Lepomis cyanellus

Longnose Gar

Lepisosteus osseus

Northern Hogsucker

Hypentelium nigricans

Pink Salmon

Oncorhynchus gorbuscha

Pumpkinseed

Lepomis gibbosus

Quillback Carpsucker

Carpiodes cyprinus

Redear Sunfish

Lepomis microlophus

Rock Bass

Ambloplites rupestris

Shorthead Redhorse Sucker

Moxostoma macrolepidotum

Silver Redhorse

Moxostoma anisurum

Warmouth Sunfish

Lepomis gulosus

White Crappie

Pomoxis annularis

White Sucker

Catostomus commersonii

Yellow Bass

Morone mississippiensis

Yellow Bullhead

Ameiurus natalis

Yellow Perch

Perca flavescens

Fish stocking schedule

Latest 5 stockings

Muskellunge815 fish · 8.9 inNov 6, 2025
Muskellunge824 fish · 9.2 inOct 30, 2024
Muskellunge163 fish · 10.1 inNov 7, 2023
Muskellunge656 fish · 9.8 inNov 1, 2023
Muskellunge820 fish · 9.7 inNov 1, 2022

Source

Michigan Department of Natural Resources

Updated Nov 13, 2026. Sizes are the length the agency reports. Dates are as precise as the agency reports them.

Open stocking page

Fishing spots, boat ramps & amenities

Learn how to get on Thornapple 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.

Bob's Gun & Tackle Shop

Shop

Know where you can legally fish on Thornapple 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.

Michigan licenses and regulations

Michigan Boating Regulations

When using any type of watercraft to access a body of water, it is important to follow all federal, state, and local rules and regulations. These rules and regulations include boat permitting and licensing, invasive species inspections and stamps, life jacket and PFD rules, motor size and horsepower restrictions, noise limitations, restrictions on personal watercraft, and many more. Visit the web link below for the most current rules and regulations for this body of water.

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Michigan Fishing License

You must purchase a fishing license if you are 17 years of age or older to fish. If you are under 17, you may fish without a license, but you are required to observe all fishing rules and regulations. Any adult actively assisting a minor who does not have a license must have a fishing license. Please note, a license is required when targeting fish, amphibians, crustaceans and reptiles. Michigan's annual fishing license is valid from March 1 of a given year through March 31 of the following year.

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Michigan Fishing Regulations

This river has a variety of species and regulations, including potential floating and/or watercraft restrictions. Because this river is specially managed for species, seasons, angling methods, and watercraft, it is strongly encouraged you check all federal, state, and local regulations before fishing. Visit any of the links below, inquire locally, or contact a local fly shop to learn current regulations and restrictions.

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Michigan Stream Access Laws

The public has a right to use a waterway for pleasure, travel, or commercial navigation. The right extends to wading on the streambed or traveling on ice. While constant movement is not required, neither can a vessel be permanently moored or use the waterway as a parking spot. The riparian owner (the owner of the land along the water) owns the streambed, but that right is subordinate to the right of navigation. On non-navigable waters the riparian owner has the right to fish and can exclude the public from fishing on such waters. But on navigable waters, the rights of the private owners are inferior to the public trust right to fish the waters.

Learn more

Take Thornapple River with you

The onWater Fish app keeps this water's access points, species and conditions in your pocket, with the tools you use once you're there.

Use the map without signal
Download the map around Thornapple River to use it offline when coverage drops.
Log your catches here
Keep a private fishing journal for Thornapple 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 Thornapple River and check the forecast before you go.