Yellowstone Cutthroat Trout

Behavior

spawning

Spawns in freshwater over gravel, with fish using stream and tributary habitats rather than any sea-run life history in Idaho.

feeding style

Opportunistic feeders that key on insects but also eat crustaceans and small fish; they readily rise in rivers where surface food is available.

seasonal notes

Best known to anglers for willing dry-fly takes in clear, cold water, especially through the main insect season in eastern Idaho rivers.

Habitat

water types

cold rivers, small streams, tributaries

preferred holds

Favors clear coldwater with gravel bottoms and gentle gradients, holding in riffle edges, seams, runs, and other well-oxygenated river habitat.

Where Found

Diet

Angler Tactics

tactics

Match insect activity and cover water methodically through seams, riffle corners, and undercut banks. In bigger systems like the South Fork and Henrys Fork, dry-dropper or nymph rigs can find fish, while careful handling is important because many Idaho waters prohibit harvest of cutthroat trout.

effective methods

dry flies, nymphs, small streamers, terrestrial patterns

Regulations

Conservation