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

Typical adult length in the waters we cover.

Water temperature

Coldwater

Water temperature

Preferred thermal regime for this species.

Active season

Spring through fall

Active season

When anglers most often encounter this species.

Origin

Native

Origin

Stocking and native history where this species is found.

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

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

Recommended waters

Diet

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

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.