Fly Fishing Firehole River - West Yellowstone

Overview

The lower Firehole River runs through a rocky canyon near Madison Junction in Yellowstone National Park. Rapids and deeper pools interrupt its current as it approaches the Gibbon confluence. Brown and rainbow trout inhabit this geothermally influenced river, with small flies and careful drifts suited to the sheltered seams between faster water.

Canyon Fishing

Look for the slower current beside a rock or the edge of a deeper pool. A nymph can cover subsurface feeding lanes, while a soft hackle offers an emerging-caddis presentation. Keep the drift in the chosen seam rather than pulling it across several currents.

Pale morning duns and caddis provide late-spring and early-summer fly choices. Blue-winged olives and smaller caddis offer fall options when surface feeding develops. Geothermal inputs shape the river’s temperature, so the fishing character differs from Yellowstone’s colder mountain streams. The canyon setting also differs from the broader meadow water farther upstream.