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Best flathead catfish lakes in Minnesota

27 Minnesota waters list flathead catfish (official records or labelled estimates), 17 mapped with survey or official-chart depth data. Ranked below by size and depth-data quality, leading with the waters in our reviewed search catalog — open any water to see exactly where to fish it: depth contours, scored spots with plain-English reasons, seasonal windows and bait picks. Solitary giant that lairs in log jams and deep holes by day and prowls at night — live bait only.

1. Lake Pepin — 50 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #1: survey-backed contours receive the ranking's data-quality boost · 5 public access sites, 1 carry-in or shore-oriented
2. St. Croix River — 78 ft max · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #2: mapped size signal; contours are approximated · 7 public access sites
3. Minnesota River — 11 ft max · Walleye, White Bass, Channel Catfish, Flathead CatfishWhy #3: mapped size signal; contours are approximated · 10 public access sites, 1 carry-in or shore-oriented
4. Cannon River — 6 ft max · Smallmouth Bass, Walleye, Northern Pike, Channel CatfishWhy #4: mapped size signal; contours are approximated · 13 public access sites, 12 carry-in or shore-oriented
5. Lake Byllesby — 50 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #5: survey-backed contours receive the ranking's data-quality boost · 3 public access sites, 1 carry-in or shore-oriented
6. St. Croix River — 15 ft max · Smallmouth Bass, Walleye, Channel Catfish, MuskellungeWhy #6: mapped size signal; contours are approximated · 8 public access sites, 1 carry-in or shore-oriented
7. Mississippi River Pool 8 (La Crosse) — 39 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, SaugerWhy #7: survey-backed contours receive the ranking's data-quality boost · 6 public access sites, 1 carry-in or shore-oriented
8. Emily — 35 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #8: survey-backed contours receive the ranking's data-quality boost · 1 public access site
9. Mississippi River Pool 4 (Red Wing) — 37 ft max · real survey depth contours · Smallmouth Bass, Walleye, White Bass, SaugerWhy #9: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
10. Winona (South Bay) — 35 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #10: survey-backed contours receive the ranking's data-quality boost · 3 public access sites, 1 carry-in or shore-oriented
11. Mississippi River Pool 3 (Hastings to Red Wing) — 30 ft max · Smallmouth Bass, Walleye, White Bass, SaugerWhy #11: mapped size signal; contours are approximated · 3 public access sites, 1 carry-in or shore-oriented
12. Mississippi River - Spring — 17 ft max · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #12: mapped size signal; contours are approximated · 1 public access site
13. Mississippi River - St. Anthony Falls Pool — 9 ft max · Largemouth Bass, Smallmouth Bass, Walleye, Northern PikeWhy #13: mapped size signal; contours are approximated · 2 public access sites
14. Volney — 60 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #14: survey-backed contours receive the ranking's data-quality boost · 1 public access site
15. Winona (North Bay) — 20 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #15: survey-backed contours receive the ranking's data-quality boost · 2 public access sites, 1 carry-in or shore-oriented
16. Dog — 25 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #16: survey-backed contours receive the ranking's data-quality boost · 1 public access site
17. Clear — 15 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, Northern PikeWhy #17: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
18. Ripley (west portion) — 15 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, Northern PikeWhy #18: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
19. Harriet — 80 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #19: survey-backed contours receive the ranking's data-quality boost · 1 public access site
20. Caroline — 40 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #20: survey-backed contours receive the ranking's data-quality boost · no verified access record attached
21. Dunns — 20 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #21: survey-backed contours receive the ranking's data-quality boost · 1 public access site
22. Richardson — 40 ft max · real survey depth contours · Largemouth Bass, Walleye, Northern Pike, CrappieWhy #22: survey-backed contours receive the ranking's data-quality boost · 1 public access site
23. La Crosse River — 38 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, SaugerWhy #23: survey-backed contours receive the ranking's data-quality boost · no verified access record attached

…plus 4 more Minnesota waters holding flathead catfish.

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When to fish flathead catfish in Minnesota

• Spring 5–20 ft — Pre-spawn fish feed hard near wood cover and hole edges.
• Summer 8–30 ft — Day = log-jam lairs and deep holes. Night = shallow flats and bar edges with big live bait.
• Fall 10–35 ft — Fish concentrate near wintering holes — the year's best big-fish window.
• Winter 20–45 ft — Stacked and sluggish in the deepest holes.

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