The Gallatin is a solid producer right now. The entire river is productive right now. In the canyon stretches smaller nymph patterns on 5x flourcarbon are very good. On cloudy days some baetis can bring up a few risers. On the lower river try dead drifting some streamers or wooly buggers trailed with a baetis emerger. Trout are transitioning out of the faster water and riffles and moving into some slicks as night time temperatures continue to drop.
The Month Ahead:
The Gallatin will continue to fish well during the fall. It isn’t a major brown trout river and there isn’t much of a fall run but the late morning and early afternoon nymph fishing is always productive. As the water continues to cool look for trout to slide into the slower and deeper water.
Long Term Fishing Forecast:
The Gallatin will continue to fish well during the fall and early winter. The water near Big Sky has some springs that keep ice shelves at bay and that water is productive on smaller nymph rigs well into the winter.