With the cooler weather the water has cooled drastically. Nymphing is the producer now. Stoneflies are a major player from now thru into June, trailed with a baetis. Fish are starting to find their winter holds in the deep runs and slower seams. The browns are just now starting the spawn on the Gallatin. The lower river is where the better fish will hold.
The Month Ahead:
Up in the canyon section time your fishing around mid-day as the canyon doesn’t see much sun. Around Big Sky a number of spring keep things ice free for the most part. Above Big Sky will start to freeze over as the temps continue to drop.
Long Term Fishing Forecast:
Even though the Gallatin drains some high elevation areas and is a natural freestone it can be a good winter fishery in select spots. Above Big Sky will freeze over making it unfishable. Around Big Sky a few springs open things up and keep fish concentrated. Throughout the canyon and down into the valley the deep slow runs will have fish stacked into them.