Brook trout
Big Lost River
Updated
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Fish › Char
Salvelinus fontinalis
A colorful introduced char of Idaho’s cold streams, small rivers, lakes, and reservoirs.
Size range
10–34 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
Introduced
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.
Brook trout are introduced to Idaho but are well established in many cold, well-oxygenated waters across the state. They are a favorite of anglers for their bright fall colors, readiness to bite, and presence in smaller streams as well as select rivers and lakes.
Also known as: brookies
Brook trout
Big Lost River
Brook trout
Big Wood River
Brook trout
Henrys Fork of the Snake River
Brook trout
Henrys Fork of the Snake River, Box Canyon to Riverside
Brook trout
Henrys Fork of the Snake River, Headwaters to Box Canyon
Brook trout
Henrys Fork of the Snake River, Riverside to Mouth / terminus
Brook trout
Teton River
They feed mainly on aquatic insects and other drifting invertebrates, with bigger fish sometimes taking small fish.
Brook trout are not a protected species, but seasons, tackle rules, and bag limits vary by water. Check the specific Idaho Fish and Game rules for your river, stream, lake, or reservoir before fishing; for example, some Bear River reaches list brook trout separately from the general trout limit.
Regulations vary by water. Check current Idaho Fish and Game rules before fishing.
Status: Introduced to Idaho
G5 (Secure) · ESA: Not listed · Idaho: SNABrowse species profiles with habitat, diet, tactics, and linked waters across the state.
Brook trout
Bear River, Cove Plant to Grace Dam
