Trico emergences are making for good early in the day fishing on the Madison River and on Fall River Basin streams. It all ends before noon. After that, switch to terrestrial patterns and hope for a cumulus build-up. The Gallatin River along Highway 191 is fishing very well if you can find a spot in a pull-out. Early AM trico activity is good. Afterwards a switch to terrestrial and traditional attractor patterns works. Later in the day, switch over to dry caddis patterns. The same will work on nearby Grayling Creek, and fewer folks will be fishing there.