Air temperatures drop into the teens during night time now. That’s the reason for fishing picking up on the Firehole River. That drop in temperature also helps convince browns and ‘bows to leave Hebgen lake to spawn. So the gulpers are gone for the year there, and the bigger ones now are more interested in heading up the Madison, the South Fork of the Madison, Cougar, Duck, and Grayling creeks. That means you need streamer pattens for the best chance to meet them.