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Best smallmouth bass lakes in Iowa

50 Iowa waters list smallmouth bass (official records or labelled estimates), 43 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. Current- and rock-loving fighter. Lives around gravel, boulders and hard-bottom structure.

1. Des Moines River — 11 ft max · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #1: mapped size signal; contours are approximated · 18 public access sites
2. Cedar River — 10 ft max · Largemouth Bass, Smallmouth Bass, Walleye, Channel CatfishWhy #2: mapped size signal; contours are approximated · 23 public access sites
3. West Okoboji Lake — 135 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #3: survey-backed contours receive the ranking's data-quality boost · 1 public access site
4. Spirit Lake — 22 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #4: survey-backed contours receive the ranking's data-quality boost · 8 public access sites
5. East Okoboji Lake — 20 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #5: survey-backed contours receive the ranking's data-quality boost · 9 public access sites
6. Wapsipinicon River — 10 ft max · Smallmouth Bass, Walleye, Channel Catfish, Common CarpWhy #6: mapped size signal; contours are approximated · 11 public access sites
7. Big Creek Lake — 50 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #7: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
8. Five Island Lake — 22 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #8: survey-backed contours receive the ranking's data-quality boost · 4 public access sites
9. Twelve Mile Creek Lake — 40 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, CrappieWhy #9: survey-backed contours receive the ranking's data-quality boost · 3 public access sites
10. Upper Iowa River — 6 ft max · Smallmouth Bass, Walleye, Channel Catfish, Rainbow TroutWhy #10: mapped size signal; contours are approximated · 1 public access site
11. Maquoketa River — 6 ft max · Smallmouth Bass, Walleye, Northern Pike, Channel CatfishWhy #11: mapped size signal; contours are approximated · 4 public access sites
12. Lost Grove Lake — 48 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #12: survey-backed contours receive the ranking's data-quality boost · 7 public access sites
13. Big Hollow Lake — 44 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #13: survey-backed contours receive the ranking's data-quality boost · 1 public access site
14. Turkey River — 9 ft max · Smallmouth Bass, Walleye, Channel CatfishWhy #14: mapped size signal; contours are approximated · 6 public access sites
15. Little River Watershed Lake — 32 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #15: survey-backed contours receive the ranking's data-quality boost · 4 public access sites
16. Lake Geode — 39 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #16: survey-backed contours receive the ranking's data-quality boost · 3 public access sites
17. Shell Rock River — 8 ft max · Smallmouth Bass, Walleye, Channel Catfish, Common CarpWhy #17: mapped size signal; contours are approximated · 6 public access sites
18. Hawthorn Lake — 28 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #18: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
19. Center Lake — 16 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #19: survey-backed contours receive the ranking's data-quality boost · 1 public access site
20. Don Williams Lake — 36 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #20: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
21. Hickory Grove Lake — 32 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #21: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
22. Red Haw Lake — 36 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #22: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
23. Lake of Three Fires — 22 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #23: survey-backed contours receive the ranking's data-quality boost · 1 public access site
24. Iowa Lake (Iowa Co.) — 28 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #24: survey-backed contours receive the ranking's data-quality boost · 1 public access site
25. Minnewashta Lake — 14 ft max · real survey depth contours · Largemouth Bass, Smallmouth Bass, Walleye, White BassWhy #25: survey-backed contours receive the ranking's data-quality boost · 2 public access sites

…plus 25 more Iowa waters holding smallmouth bass.

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When to fish smallmouth bass in Iowa

• Spring 3–12 ft — Gravel and rock flats near deep water; spawning happens on hard bottom.
• Summer 10–30 ft — Offshore rock humps and deep points; smallmouth suspend near bait.
• Fall 8–25 ft — Feeding hard for winter — long tapering points and rocky drops.
• Winter 20–45 ft — Deep, vertical presentations near rocky wintering holes.

Also in Iowa: best largemouth bass lakes · best walleye lakes · best white bass lakes · best northern pike lakes · best crappie lakes · best bluegill lakes · best channel catfish lakes · best muskellunge lakes · best yellow perch lakes · best flathead catfish lakes · best freshwater drum lakes · best common carp lakes

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