The Gallatin is a solid producer right now. The best fishing is up in the canyon. In the valley a very early start is advised. Spruce moths are on the water early in the morning in the canyon before the sun hits the water. Fishing slows down after lunch and then picks up again in the hour before dark. The lower river has less water due to irrigation and fishing in the middle and lower valley is closed after 2pm to protect fish from warmer afternoon water temperatures.
The Month Ahead:
The Gallatin will continue to fish well during the low light hours. As nights get longer and water temps begin dropping mid day fishing will slowly improve.
Long Term Fishing Forecast:
The Gallatin will be a good option well into October. In the fall the valley fishing improves as temperature drops. Baetis hatches in late September and October can produce some dry fly action. The Gallatin doesn't experience significant fall run fishing but it is still a great option and often you can have this great river all to yourself.