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

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  4. Bonneville Cutthroat Trout

Updated June 25, 2026

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Bonneville Cutthroat Trout: fish species profile

Fish › Trout

TroutSalmonidaeT3 (Vulnerable) · ESA: Not listed · Idaho: S3

Bonneville Cutthroat Trout

Oncorhynchus clarkii utah

A native cutthroat of Idaho’s cold, clear small streams and gravel-bottom runs.

Overview

Size range

Up to 39 in

Size range

Up to 39 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.

Origin

Native

Origin

Native

Origin

Stocking and native history where this species is found.

About Bonneville Cutthroat Trout

Bonneville cutthroat trout are a native Idaho cutthroat with vulnerable conservation status in the state. They are coldwater trout most associated with relatively small streams, especially those with gravel bottoms and gentle gradients.

Bonneville Cutthroat Trout Silhouette

  • Bonneville Cutthroat Trout species silhouette
    Primary

Behavior

spawning
Spawns in streams over gravel.
feeding style
Feeds on insects, crustaceans, and small fish, so it usually responds best to natural, food-matching presentations.
seasonal notes
Most active in cold, clear flowing water; fishing is often best when flows and temperatures keep fish comfortable in smaller streams.

Habitat

water types
small streams, cold creeks, headwater rivers
preferred holds
Look for fish in cold, clear runs, pools, and riffle seams in smaller streams with gravel bottoms and gentle gradients.

Where Found

Not yet linked to waters

This species has not been linked to a river or lake in our catalog yet.

Angler Tactics

tactics
Fish light line and stealthy presentations in clear water. Cover pocket water, undercut banks, seams, and deeper runs with small offerings that imitate stream insects or other natural prey.
effective methods
dry flies, nymphs, small spinners, small spoons, natural-looking bait where legal

Regulations

Bonneville cutthroat trout are a native fish with vulnerable status in Idaho, and seasons or harvest rules can vary by water. Always check the current Idaho fishing regulations for the specific water before fishing or keeping fish.

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

Conservation

Status: Native to Idaho (S3)

T3 (Vulnerable) · ESA: Not listed · Idaho: S3

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