Frankly there are a lot of places in and around the Park that offer much better fishing right (consider the Gallatin for example my friends), though we seem to get inquiries about the Firehole endlessly during the season.
Morning water temps even on the lower Firehole have been looking better; this past week temps have been creeping down to the 63-64 degree range (chart). We agree heartily with those who are advising a very cautious approach to the lower Firehole right now – water temps need to followed carefully and it’s still probably too warm below Midway to fish these days.
That said, more than one Firehole loving friend and neighbor has seen and fished the Fall Baetis as well as ongoing Caddis (white miller, with Hydropscyhe just around the corner.
The upper river (above Old Faithful) looks even better; water temps have been ranging from a very promising 50 in the morning to the low 60s during the heat of the afternoon.
Not in her fall prime by any means, but it’s not far off.
Tags: River - YNP - Firehole
