Yellowstone Park, October 21st, 2023
If you are a top water fishing enthusiast, the Firehole River offers some of the best fishing in the entire area with BWO ( see above photo) activity being the reason for such. Swinging traditional soft hackled patterns ( partridge & olive, partridge and tan, etc) works as well as anything. Afternoon dry fly fishing using small (#20, #22) BWO dun and spinner patterns of choice is also effective.
Brown trout runs in the Madison and Lewis River drainages are peaking with those in the Snake and Gardner Rivers coming on. Unsettled weather coming up should enhance fishing success in these runs, but be prepared for increased chances for snow and drops in air temps.