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Lake trout in Minnesota
Salvelinus namaycush — native to Minnesota, holding water between 46 and 54°F. This state's files carry no stream record of it, and this page says so rather than filling the gap.
Lake trout are native to Minnesota twice over: to Lake Superior, and to the deep cold lakes of the Arrowhead and the Boundary Waters, which carry self-sustaining inland populations no other state on this site has. That is the whole difference between this page and the Michigan and Wisconsin ones, where the fish is a Great Lakes fish and little else.
It is not a stream fish here. The band is 46 to 54°F with 59 the upper limit — colder than anything else on this site holds — and eighteen to thirty-two inches is ordinary. Spawning is October and November over cobble and rubble reefs, in the lakes rather than in the rivers.
This site maps running water, and Minnesota's Chapter 6264 designation covers streams, so no water is listed on this page. A river angler meets this fish near a river mouth or not at all.
- 46–54°FWater, preferred
- 18–32"Typical length
- NativeIn Minnesota
- 0Waters listed here
What it is
Salmonidae — char, genus Salvelinus · Salvelinus namaycush
- Grey to bronze-green ground colour covered in pale cream spots — light marks on a dark fish, like a brook trout, and unlike either of the spotted trout.
- A deeply forked tail. Nothing else here has one.
- No pink stripe, no red spots, no halos.
- Lower fins edged white, more faintly than a brook trout's.
Typical length in Minnesota is 18 to 32 inches. That is a curated range for water of this kind, not an average of any survey: MDNR's abundance file counts fish per acre and per mile and records no lengths at all, and no other state on this site publishes lengths either.
Native or stocked
Native to Lake Superior and to the deep, cold lakes of the Arrowhead and the Boundary Waters, which hold self-sustaining inland populations no other state on this map has. Not a stream fish here.
Where to find it in Minnesota
Minnesota does not publish which species each segment holds. What MN DNR publishes is not a survey and not a habitat class at all — it is a law. Minnesota Rules Chapter 6264 designates trout water and the tributaries that feed it, for watershed and timber-harvest planning as much as for fishing. So this is not a list of waters this fish has been recorded from, and it is not presented as one: it is the state's own designated water, filtered to the drainage size this species occupies and ranked with the designated stream ahead of the protected tributary. Treat it as where to start looking.
No water in Minnesota's files on this site carries a record of lake trout in a stream. That is the record, not an omission — see the note below.
Minnesota's classified trout water, whole
The inventory the list above was drawn from, by the state's own class.
| Class | Named waters | Miles |
|---|---|---|
| Designated trout stream — Chapter 6264 | 463 | 3371 |
| Protected tributary — Chapter 6264 | 23 | 25 |
Where that is on the map
Every subwatershed this site covers in Minnesota as a faint dot, and the ones holding the waters listed above lit. A coverage map with this species on it — the map on the front of the site is the map.
When to fish for it
Lake trout hold 46–54°F water and are under real stress above 59°F. On this map's own colours that band is cold water, which is what the river pages and the live map are painting when they run green and blue. The season follows the temperature rather than the calendar: the water is in the band early and late in the day through the summer, and all day either side of it.
Spawning: October and November, over cobble and rubble reefs — in the lakes, not in the rivers.
How to catch it
Deep, cold lake water. This is a Great Lakes and inland-lake fish that a river angler meets, if at all, near a river mouth or in the coldest big-lake water rather than up a stream.
Patterns from this site's book, chosen by the insects recorded from Minnesota's own regions and filtered to the kinds worth putting in front of this fish. Each one has its tying recipe.
- Muddler Minnow streamer · #4–10 — Grasshopper
- Woolly Bugger (Black) streamer · #2–12 — Giant Black Stonefly (Salmonfly)
- Woolly Bugger (Olive) streamer · #2–12 — Cranefly
Rules for lake trout in Minnesota
Minnesota does not publish its limits split by species: the bag and the season apply to trout as a group, by the class or category the water carries. So what follows is that, and not a lake trout rule dressed up as one. Snapshot taken 2026-08-17.
| Class | Bag | Season | Waters |
|---|---|---|---|
| designated trout stream | — | — | 415 |
| designated trout stream tributary | — | — | 98 |
The full Minnesota regulation page →
Habitat notes
Deep, cold lake water. This is a Great Lakes and inland-lake fish that a river angler meets, if at all, near a river mouth or in the coldest big-lake water rather than up a stream.
- 46–54°F preferred
- 59°F upper limit
- cold on this map's colours
The four thermal classes named there are the ones every river on this site is painted with, at breaks of 58, 64 and 70°F. A river page showing cold water is showing water inside this fish's band; that is the whole point of the colour.
The other trout in Minnesota
- Brook trout in Minnesota Salvelinus fontinalis
- Brown trout in Minnesota Salmo trutta
- Rainbow trout in Minnesota Oncorhynchus mykiss
Lake trout in the other states
The same fish, on different water and under different rules. Michigan's sand-bottomed rivers, Wisconsin's driftless springs, Minnesota's North Shore, Virginia's mountain brook water and North Carolina's tailwaters and freestone gradient are five fisheries, and the limits differ with them.
Open the trout map →Every trout stream near you, coloured by today's water temperature.