The current flows out of Island Park are 1,370 cfs. Flows have increased recently due to irrigation demand and may continue to increase with the rising temperatures and no rain in the forecast. The upper HF in the Box Canyon area has been day to day, one day it will be fishing decent and the next it has been tough. Nymphing is going to produce the best using a duracell or a dry dropper rig with a golden stone and a pt leggy aka “bowling ball” nymph below.
In the Railroad Ranch there are pmd’s still going, drakes are pretty much done. Best fishing will be in the mornings on pmds and caddis, in the evenings with flavs. The Warm River-Ashton section is fishing okay. We are seeing caddis and yellow sallies. Using a dry-dropper rig should produce. A large chubby chernobyl pattern in gold or peach color will work for up top and then below you can try using an olive bullet #14, yellow sally nymphs, or olive hot spot #14. Fishing has been best in the mornings, tends to slow down in the afternoon.
Flows out of the Ashton reservoir are 2,380 cfs. The lower Henry’s Fork is fishing well. We are seeing pmds and spinners in the morning and goldenstones in the afternoon. A pmd no ass #18, henry’s fork goldenstone #8 or #10, and a rusty spinner should do the trick.
Feel free to stop by our Ashton Fly Shop for a daily report, 1051 Hwy 20 Ashton, ID 83420 208.652.3008, open 7 days a week 8 am – 5 pm.