2026 regulation year
Idaho Lake trout 2026 — Season, Bag Limit, Size Rules
Salvelinus namaycush
Last updated
Lake trout (Mackinaw, Salvelinus namaycush) occupy a unique regulatory position in Idaho: on the two big panhandle lakes where they prey on native + recreational fish, IDFG manages them as a species to be suppressed rather than protected. On Lake Pend Oreille (148 sq mi, 1,158 ft deep) lake trout predation collapsed the kokanee + Kamloops rainbow fishery, so IDFG runs an aggressive suppression program — commercial-scale gillnetting plus the Angler Incentive Program that pays cash rewards for harvested lake trout — and there is no daily limit; anglers are encouraged to keep every lake trout they catch. Priest Lake (23,000 acres) carries the same Mackinaw-suppression posture to protect its native bull trout, with no daily bag and harvest encouraged. The critical angler responsibility on both lakes is telling lake trout apart from native bull trout (Salvelinus confluentus), which are federally Threatened under the ESA and must be released unharmed (0 / day catch-and-release-only) — lake trout show light spots on a dark body + a deeply forked tail, while bull trout have pale pink/orange spots + no black on the dorsal fin. Lake trout are a cold, deep-water fish targeted by downrigger trolling, deep jigging, and through the ice in winter; Priest + Pend Oreille produce fish into the 20-30+ lb class.
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Season
Open year-round Open year-round; densest fishing November – April (early-season + ice fishery) on Lake Pend Oreille + Priest Lake; no daily limit on the suppression waters.
Bag & possession
- Daily bag
- No daily limit on Lake Pend Oreille + Priest Lake (IDFG Mackinaw-suppression — harvest encouraged); check listed waters for any limit
- Possession
- No possession limit on the Mackinaw-suppression waters
Size, slot, trophy rules
- Size
- No statewide minimum
- Trophy rule
- Lake Pend Oreille + Priest Lake produce 20-30+ lb lake trout; IDFG-distinctive no-limit suppression rule (Pend Oreille Angler Incentive Program pays cash for harvested lake trout); anglers must distinguish lake trout from federally Threatened native bull trout (0 / day catch-and-release-only)
Gear restrictions
- Hook-and-line; downrigger trolling + deep jigging are the dominant methods
- Ice-fishing tip-ups + jigging permitted during winter season
- Native bull trout (Salvelinus confluentus) must be released unharmed — 0 / day catch-and-release-only (federally Threatened ESA)
- IDFG Fishing Licence required ages 14+ ($30.50 res / $108.25 NR annual)
- Confirm current-year IDFG Fish + Game Rules for per-water lake trout rule
Named water-body overrides
Where statewide rules differ on specific Idaho waters:
Lake Pend Oreille
No daily limit (IDFG Mackinaw-suppression + Angler Incentive Program); harvest encouraged to protect kokanee + trophy rainbow trout
Priest Lake
No daily bag, harvest encouraged (Mackinaw-suppression to protect native bull trout); bull trout 0 / day catch-and-release-only
Official source
Idaho Department of Fish and Game (IDFG) publishes the authoritative 2026 Idahofishing regulations. Always verify the current rule before fishing — emergency closures and in-season changes can override what's published here.
Visit official Idaho fishing regulations →
Emergency-order channel
Lake trout closures, slot-limit changes, and harvest pauses are posted to Idaho Department of Fish and Game's emergency-order feed — check it before any Idaho trip during the active season.
Frequently asked questions
- When is lake trout season in Idaho?
- Idaho keeps lake trout open to fishing year-round for the 2026 regulation year — there is no closed season, though the daily bag and size limits below still apply every day.
- What is the Idaho bag limit for lake trout?
- The Idaho daily bag limit for lake trout is No daily limit on Lake Pend Oreille + Priest Lake (IDFG Mackinaw-suppression — harvest encouraged); check listed waters for any limit. The possession limit is No possession limit on the Mackinaw-suppression waters. Some named waters set a different limit — check the water-body overrides above.
- What size lake trout can you keep in Idaho?
- The Idaho size rule for lake trout is No statewide minimum. Trophy rule: Lake Pend Oreille + Priest Lake produce 20-30+ lb lake trout; IDFG-distinctive no-limit suppression rule (Pend Oreille Angler Incentive Program pays cash for harvested lake trout); anglers must distinguish lake trout from federally Threatened native bull trout (0 / day catch-and-release-only).
- Do you need a license to fish for lake trout in Idaho?
- Yes. Idaho requires a valid fishing license to fish for lake trout, with the usual exemptions for young children, state free-fishing days, and some senior or disabled-veteran categories. A license is valid only in the state that issued it, so non-residents need a Idaho license — compare resident and non-resident Idaho fees on the state regulations page below.
- Are there gear restrictions for lake trout in Idaho?
- Yes. In Idaho, lake trout fishing carries these gear rules: Hook-and-line; downrigger trolling + deep jigging are the dominant methods; Ice-fishing tip-ups + jigging permitted during winter season; Native bull trout (Salvelinus confluentus) must be released unharmed — 0 / day catch-and-release-only (federally Threatened ESA); IDFG Fishing Licence required ages 14+ ($30.50 res / $108.25 NR annual); Confirm current-year IDFG Fish + Game Rules for per-water lake trout rule.
- Do specific Idaho waters have different lake trout rules?
- Yes. 2 named Idaho waters carry rules that override the statewide lake trout regulation, including Lake Pend Oreille, Priest Lake. See the named water-body overrides above for the exact rule on each.