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© 2026 Barbless.co. Flow and gauge data from USGS; weather from Open-Meteo. · v2026.10.18.2

  1. Home
  2. Fish
  3. Char
  4. Bull Trout

Updated June 25, 2026

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Bull Trout: fish species profile

Fish › Char

CharSalmonidaeG3 (Vulnerable) · ESA: Not listed · Idaho: S3

Bull Trout

Salvelinus confluentus

Idaho’s native char: a coldwater apex predator that is protected and must be released.

Overview

Size range

25–41 in

Size range

25–41 in

Size range

Typical adult length in the waters we cover.

Water temperature

Coldwater

Water temperature

Coldwater

Water temperature

Preferred thermal regime for this species.

Active season

Spring through fall

Active season

Spring through fall

Active season

When anglers most often encounter this species.

Origin

Native

Origin

Native

Origin

Stocking and native history where this species is found.

Habitat

Headwater Streams, Rivers & Large Rivers, Lakes & Reservoirs

Habitat

Headwater Streams, Rivers & Large Rivers, Lakes & Reservoirs

Habitat

Primary water types where this species is found.

About Bull Trout

Bull trout are native to Idaho and depend on very cold, clean water, making them a strong indicator of healthy watersheds. They grow large, often hold in deep pools of big rivers and lakes, and are sometimes encountered while fishing for other trout.

Bull Trout Silhouette

  • Bull Trout species silhouette
    Primary

Behavior

spawning
River- and lake-connected fish spawn in tributaries; young often remain there for one to three years before moving to larger water.
feeding style
Highly predatory; larger fish feed mainly on other fish and will also take crayfish.
seasonal notes
Most common in cold, high-mountain systems, especially where snowfields and glaciers help keep water temperatures low.

Habitat

water types
cold rivers, large pools, mountain streams, cold lakes, spawning tributaries
preferred holds
Deep pools, cold runs, and other secure holding water in large, cold rivers and lakes; spawning fish move into cold tributaries.

Where Found

Blue Ribbon waters

  • Bull trout present/protected

    Kelly Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Lochsa River

    Present; protected, no harvest

  • Bull trout present/protected

    Middle Fork Salmon River

    Present; protected, no harvest

  • Bull trout present/protected in system

    North Fork Coeur d'Alene River

    Present in system; protected

  • Bull trout present/protected

    Saint Joe River

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Bayhorse Recreation Site to Tappan

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Cache Bar to Carey Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Campbell Flat to Pine Bar

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Carey Creek to Riggins

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Colston Creek to Shoup Bridge Campground

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Corn Creek Campground to Spring Bar

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Deadwater Spring to Corn Creek Campground

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Hammer Creek to Mouth / terminus

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Headwaters to Sawtooth Kids Pond

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Lucile Recreation Site to Campbell Flat

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Maynard Hole to Hammer Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Riggins to Maynard Hole

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Sawtooth Kids Pond to Sunbeam

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Shoup Bridge Campground to Tower Rock Recreation Site

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, South Butte to Bayhorse Recreation Site

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Spring Bar to Lucile Recreation Site

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Sunbeam to South Butte

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Tappan to Colston Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Salmon River, Tower Rock Recreation Site to Cache Bar

    Present; protected, no harvest

  • Bull trout present/protected

    Selway River

    Present; protected, no harvest

  • Bull trout present/protected in drainage

    South Fork Boise River

    Present in drainage; protected

Recommended waters

  • Bull trout present/protected

    Bear Valley Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Cayuse Creek

    Present; protected, no harvest

Bull Trout on the podcast

  • Adam Hudson of Blue Line Flies, Wild Fly Productions, and the Short Bus Diaries

    Episode 172 · Dec 23, 2021

    Adam Hudson of Blue Line Flies, Wild Fly Productions, and the Short Bus Diaries

    Listen on the Barbless Podcast

Diet

Mostly eats fish, with crayfish also part of the diet.

  • AntInferred
  • BeetleInferred
  • Blue-winged OliveInferred
  • CaddisInferred
  • Golden StoneflyInferred
  • GrasshopperInferred
  • Green DrakeInferred
  • LeechInferred
  • Mahogany DunInferred
  • March BrownInferred
  • MidgeInferred
  • October CaddisInferred
  • Pale Morning DunInferred
  • Pink AlbertInferred
  • SalmonflyInferred
  • SculpinInferred
  • SkwalaInferred
  • TricoInferred
  • Yellow SallyInferred

Angler Tactics

tactics
Bull trout are usually a bycatch while targeting other trout in very cold water. Fish deep, cold holding water with presentations that resemble small fish, but if you hook one, keep handling to a minimum and release it immediately.
effective methods
incidental streamer takes, minnow-imitating lures, crayfish patterns

Regulations

Protected species in Idaho. No harvest, if caught, release it immediately and handle as little as possible. Always check the current Idaho Fish and Game rules for the specific water.

This species has special protection rules here.

Regulations vary by water. Check current Idaho Fish and Game rules before fishing.

Conservation

Status: Native to Idaho (S3)

G3 (Vulnerable) · ESA: Not listed · Idaho: S3

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On this page

OverviewSilhouetteBehaviorHabitatWhere FoundFrom the PodcastDietAngler TacticsRegulationsConservation

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On this profile

  • 45 waters
  • 19 food sources
  • 1 photo

Bull trout

Clark Fork River

  • Bull trout present/protected

    Crooked Fork

    Present; protected, no harvest

  • Bull trout present/protected

    East Fork Salmon River

    Present; protected, no harvest

  • Bull trout

    Kootenai River

  • Bull trout present/protected

    Last Chance Creek, Custer County

    Present; protected, no harvest

  • Bull trout present/protected

    Little North Fork Clearwater River

    Present; protected, no harvest

  • Bull trout present/protected

    Loon Creek

    Present; protected, no harvest

  • Bull trout present/protected

    Middle Fork Boise River

    Present; protected, no harvest

  • Bull trout present/protected

    Middle Fork Payette River

    Present; protected, no harvest

  • Bull trout present/protected

    North Fork Boise River

    Present; protected, no harvest

  • Bull trout present/protected

    North Fork Clearwater River

    Present; protected, no harvest

  • Bull trout present/protected

    North Fork Payette River

    Present; protected, no harvest

  • Bull trout present/protected

    Pahsimeroi River

    Present; protected, no harvest

  • Bull trout present/protected in system

    South Fork Coeur d'Alene River

    Present in system; protected

  • Bull trout present/protected

    South Fork Payette River

    Present; protected, no harvest

  • Bull trout present/protected

    Yankee Fork Salmon River

    Present; protected, no harvest