Brown trout migration is the major Park fishing attraction this time of year, and there are several choice for enjoying this event. My long-time favorites are the Beaver Meadows of the Madison River and the Lewis River above and below Lewis Lake. On both of these large streamers are the key, with some in bright and some in somber colors. Low light conditions are usually best in both places. Fish in the smaller Lewis River can be stressed more easily, so the best time to fish it is mainly from first light until mid morning when visiting anglers begin to accumulate. The number of brown trout migrating in this system is the largest in the Park. In the larger Beaver Meadows reach of the Madison River, I have had days where good luck lasts the entire day, so long as I fish deep. But do not restrict your visits to these locations. The run of Yellowstone River browns into the Gardner River and that of browns into the Snake River above the South Entrance, are now in progress. So are runs in Duck Creek, Grayling Creek and into the Gibbon River. So you don’t like pitching streamer patterns this tome of year? Try presenting BWO life cycle patterns during afternoon visits to the Firehole River.