Three Rivers Imp. Fishing
A 491-acre Michigan lake in St. Joseph County.
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A first look at Three Rivers Imp.
Three Rivers Imp. spreads across 491 acres in St. Joseph County, by the EGLE inland lake layer. About 2 miles separates Three Rivers Imp. from Three Rivers. On the Lower Peninsula, it belongs to the Southern Lake Michigan Management Unit. Ecoregion Southern Michigan/Northern Indiana Drift Plains; basin Southeastern Lake Michigan.
The shore holds 1 public launch. EGLE satellite clarity: about 4 feet (2023).
Public launches on Three Rivers Imp.
- Stump Bay Boat Access1 lane, 20 trailer spaces, toilet, Recreation Passport; Cassopolis Field Office
Launch sites a short tow from Three Rivers Imp.
- Noah Lake Boat AccessNoah Lake, under a mile southwest
- Covered Bridge ParkSturgis Dam Pond – Saint Joseph River, 3 miles northeast
- Fisher's Lake Boat AccessFishers Lake, 3 miles north
- Pleasant Lake Boat AccessPleasant Lake, 7 miles west
- Portage Lake Boat Access near MendonPortage Lake, 7 miles northeast
- Mendon Boat AccessSaint Joseph River, 7 miles northeast
MDNR Parks and Recreation boat access sites and MDNR fishing sites, checked October 2026.
How clear Three Rivers Imp. runs
The Three Rivers Imp. clarity bars are EGLE July to September satellite averages, shown in feet.
The 2023 chlorophyll a estimate is 17.82 micrograms per liter.
EGLE Michigan Inland Lakes Water Clarity layer (Landsat, July to September), checked October 2026. Depth is not published here: the layer depth fields are unreliable.
Harvest rules on Three Rivers Imp.
| Species | Limit | Season |
|---|---|---|
| Largemouth and smallmouth bass | 5 in any combination; minimum 14 inches | Possession: Sat. before Memorial Day – Dec. 31; catch-and-immediate-release open all year |
| Walleye (Lower Peninsula) | 5; minimum 15 inches | Last Sat. in April – March 15 |
| Northern pike (Lower Peninsula) | 2; minimum 24 inches | Last Sat. in April – March 15 |
| Muskellunge | Only 1 per angler per license year (April 1 – March 31); mandatory harvest registration within 24 hours; minimum 42 inches (46, 50 or 38 inches on listed waters) | Possession: 1st Sat. in June – March 15; catch-and-immediate-release open all year |
| Yellow perch | 25 | Open all year |
| Sunfish and crappie | 25 in any combination of the listed species | Open all year |
| Channel catfish | 10; minimum 12 inches | Open all year |
| Flathead catfish | 5; minimum 15 inches | Open all year |
| White bass | 10 | Open all year |
| Cisco and whitefish | 5 in any combination | Open all year |
| Burbot | 5 | Open all year |
| Trout in unclassified lakes | 5, no more than 3 of which may be 15 inches or greater; minimum 8 inches | Open all year |
These are the Lower Peninsula inland rows that cover Three Rivers Imp.
2026 Michigan Fishing Regulations (April 1, 2026 to March 31, 2027), statewide tables and county exceptions, checked October 2026.
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| Lake | Distance | Acres | Launches | Clarity ft | Fish listed |
|---|---|---|---|---|---|
| Three Rivers Imp. | 491 | 1 | 4 | 0 | |
| Noah Lake | under a mile southwest | 51 | 1 | 2.3 | 0 |
| Fishers Lake | 3 miles north | 330 | 1 | 8.6 | 0 |
| St. Joseph River, St. Joseph County | 3 miles west | 16 | 0 | 0 | |
| Sturgis Dam Pond | 5 miles northeast | 574 | 1 | 6.3 | 0 |
| Pleasant Lake, St. Joseph County | 6 miles west | 256 | 1 | 12 | 1 |
EGLE inland lake layer, MDNR access sites and Fish Atlas.
Close by Three Rivers Imp.
Neighboring lakes to Three Rivers Imp.
- Noah Lakeunder a mile southwest
- Fishers Lake3 miles north
- St. Joseph River, St. Joseph County3 miles west
- Sturgis Dam Pond5 miles northeast
- Pleasant Lake, St. Joseph County6 miles west
Live bait and lures near Three Rivers Imp.
- Keough Hacklesbait and tackle shop, Mendon, 6 miles
- Corey Lake Marinamarina, Three Rivers, 9 miles
- AMSOIL DEALERmarina, Three Rivers, 10 miles
- Angler's Oasisbait and tackle shop, Three Rivers, 10 miles
- Klinger Lake Trading Postbait and tackle shop, Sturgis, 11 miles
- Fisher Bait & Tacklebait and tackle shop, White Pigeon, 11 miles
Guided trips on Three Rivers Imp.
- Golden Eye Charterscharter, Berrien Center, (269) 471-7162
Overnight stops close to Three Rivers Imp.
- Three Rivers3 miles
- Centreville3 miles
- Mendon8 miles
Where Three Rivers Imp. sits by county
- St. Joseph Countyseat: Centreville
A Piscifun setup for a day on Three Rivers Imp.
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Fish an angler meets at Three Rivers Imp.
Photo: Fizzishin, CC BY 4.0
Photo: USFWS Mountain Prairie, Public domain
Photo: BenitoJuarez98, CC BY-SA 4.0
Photo: Eric Engbretson for U.S. Fish and Wildlife Service, Public domain
Three Rivers Imp. questions Michigan anglers ask
In which Michigan county is Three Rivers Imp.?
Find it in St. Joseph County, Southern Lake Michigan Management Unit, about 2 miles from Three Rivers.
How many acres does the EGLE layer credit to Three Rivers Imp.?
About 491 acres.
How many public launches reach Three Rivers Imp.?
1 public launch; Stump Bay Boat Access is the biggest.
Which fish has the MDNR found in Three Rivers Imp.?
Its fish are not on record.
Which limits apply on Three Rivers Imp.?
Walleye (Lower Peninsula): 5; minimum 15 inches; season Last Sat. in April – March 15.
What does a license cost to fish Three Rivers Imp.?
Anglers 17 and older carry a Michigan all-species fishing license: $26 a year for residents, $76 for nonresidents, $11 for seniors or $10 for one day.
How deep does sunlight reach in Three Rivers Imp.?
EGLE estimated 4 feet in 2023.
Which store on our Michigan list is closest to Three Rivers Imp.?
Try Keough Hackles, roughly 6 miles off.
Haul the boat to Three Rivers Imp.
Check the limits above, then choose a launch.