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Best brown trout lakes in Montana

33 Montana waters hold brown trout, 21 mapped with real state-agency depth surveys. Ranked below by size and depth-data quality — open any water to see exactly where to fish it: depth contours, scored spots with plain-English reasons, seasonal windows and bait picks. Wary, nocturnal-leaning predator. Shorelines and inflows in cold months; the thermocline in summer.

1. Canyon Ferry Reservoir — 130 ft max · survey depth data · Largemouth Bass, Smallmouth Bass, Walleye, Northern PikeWhy #1: survey-backed contours receive the ranking's data-quality boost · 9 public access sites
2. Hebgen Lake — 75 ft max · survey depth data · Rainbow Trout, Brown Trout, Lake Whitefish, Arctic GraylingWhy #2: survey-backed contours receive the ranking's data-quality boost · 3 public access sites
3. Hauser Lake — 65 ft max · survey depth data · Walleye, Northern Pike, Rainbow Trout, Yellow PerchWhy #3: survey-backed contours receive the ranking's data-quality boost · 1 public access site
4. Yellowstone River — 10 ft max · Smallmouth Bass, Sauger, Rainbow Trout, Common CarpWhy #4: mapped size signal; contours are approximated · 10 public access sites
5. Beaverhead River — 10 ft max · Rainbow Trout, Brown Trout, Lake WhitefishWhy #5: mapped size signal; contours are approximated · 7 public access sites
6. Clark Canyon Reservoir — 91 ft max · survey depth data · Rainbow Trout, Common Carp, Brown Trout, Brook TroutWhy #6: survey-backed contours receive the ranking's data-quality boost · 4 public access sites
7. Lake McDonald — 162 ft max · Rainbow Trout, Yellow Perch, Brown Trout, Brook TroutWhy #7: mapped size signal; contours are approximated · no verified access record attached
8. Madison River — 6 ft max · Rainbow Trout, Brown TroutWhy #8: mapped size signal; contours are approximated · 8 public access sites
9. Seeley Lake — 120 ft max · survey depth data · Largemouth Bass, Northern Pike, Rainbow Trout, Yellow PerchWhy #9: survey-backed contours receive the ranking's data-quality boost · 4 public access sites
10. Gallatin River — 8 ft max · Rainbow Trout, Brown Trout, Lake Whitefish, Cutthroat TroutWhy #10: mapped size signal; contours are approximated · 3 public access sites
11. Quake Lake — 120 ft max · survey depth data · Rainbow Trout, Brown Trout, Lake WhitefishWhy #11: survey-backed contours receive the ranking's data-quality boost · 1 public access site
12. Bighorn River — 8 ft max · Rainbow Trout, Brown TroutWhy #12: mapped size signal; contours are approximated · 3 public access sites
13. Bitterroot River — 6 ft max · Northern Pike, Rainbow Trout, Brown TroutWhy #13: mapped size signal; contours are approximated · 9 public access sites, 1 carry-in or shore-oriented
14. Blackfoot River — 8 ft max · Rainbow Trout, Brown Trout, Lake Whitefish, Cutthroat TroutWhy #14: mapped size signal; contours are approximated · 5 public access sites
15. Salmon Lake — 65 ft max · survey depth data · Largemouth Bass, Northern Pike, Rainbow Trout, Yellow PerchWhy #15: survey-backed contours receive the ranking's data-quality boost · 4 public access sites
16. Yellowtail Afterbay Reservoir — 46 ft max · survey depth data · Walleye, Sauger, Channel Catfish, Rainbow TroutWhy #16: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
17. Newlan Reservoir — 87 ft max · survey depth data · Rainbow Trout, Brown Trout, Brook Trout, KokaneeWhy #17: survey-backed contours receive the ranking's data-quality boost · 1 public access site
18. Missouri River — 11 ft max · Rainbow Trout, Common Carp, Brown TroutWhy #18: mapped size signal; contours are approximated · 10 public access sites, 3 carry-in or shore-oriented
19. Lake Helena — 12 ft max · survey depth data · Walleye, Northern Pike, Rainbow Trout, Yellow PerchWhy #19: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
20. Lake Inez — 72 ft max · survey depth data · Northern Pike, Rainbow Trout, Yellow Perch, Brown TroutWhy #20: survey-backed contours receive the ranking's data-quality boost · no verified access record attached
21. Placid Lake — 93 ft max · survey depth data · Largemouth Bass, Rainbow Trout, Yellow Perch, Brown TroutWhy #21: survey-backed contours receive the ranking's data-quality boost · 2 public access sites
22. Ackley Lake — 39 ft max · survey depth data · Rainbow Trout, Muskellunge, Brown Trout, Brook TroutWhy #22: survey-backed contours receive the ranking's data-quality boost · no verified access record attached
23. Canyon Lake (Carbon) — 80 ft max · survey depth data · Largemouth Bass, Smallmouth Bass, Walleye, Northern PikeWhy #23: survey-backed contours receive the ranking's data-quality boost · no verified access record attached
24. Glenns Lake — 28 ft max · Rainbow Trout, Yellow Perch, Brown Trout, Brook TroutWhy #24: mapped size signal; contours are approximated · no verified access record attached
25. East Rosebud Lake — 20 ft max · survey depth data · Rainbow Trout, Brown Trout, Brook TroutWhy #25: survey-backed contours receive the ranking's data-quality boost · no verified access record attached

…plus 8 more Montana waters holding brown trout.

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When to fish brown trout in Montana

• Spring 3–25 ft — Cold-water browns hug shorelines, river mouths and mud lines — often in a few feet of water early and late.
• Summer 25–60 ft — Browns sit at the thermocline by day and slide shallow after dark — the night troll takes the giants.
• Fall 5–30 ft — Spawn-run browns stage off tributaries and gravel shorelines, aggressive and territorial.
• Winter 5–35 ft — Browns feed all winter — nearshore when bait is in, deeper breaks otherwise.

Also in Montana: best largemouth bass lakes · best smallmouth bass lakes · best walleye lakes · best sauger lakes · best northern pike lakes · best crappie lakes · best bluegill lakes · best channel catfish lakes · best rainbow trout lakes · best muskellunge lakes · best yellow perch lakes · best common carp lakes · best lake trout lakes · best brook trout lakes · best kokanee lakes · best lake whitefish lakes · best burbot lakes · best arctic grayling lakes · best cutthroat trout lakes · best pumpkinseed lakes

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