Against all midsummer odds, the Henry’s Fork is officially “holding up its end of the deal so far despite a grim outlook in the early days of the season.” Big Sky Anglers reported that the worst of the blistering heat is behind us, water clarity is behaving, and cooler flows out of Island Park Dam (736 cfs) have kept trout active across the river system. Up in Box Canyon, pocket-water nymphing with small perdigons and trailing dry-droppers are getting the job done, though you will want to shorten your droppers to dodge late-season weeds—because, as the shop dryly notes, “these trout don’t generally appreciate salad on their flies.”

Down on the Railroad Ranch, recent rains triggered sporadic winged ant “nuptial flights,” making honey ants, cinnamon ants, and Callibaetis spinners mandatory gear for purists who want to “find a few to dance with if they’re willing to put in the time and mileage.” If you prefer faster pace over techy flats, the canyon sections are ripe for the classic “Chubberlegs” dry-dropper rig, while the Warm River to Ashton stretch remains the ultimate foolproof playground for steady, bend-in-the-rod action—just save the lower river below Ashton for cloudy days when water temps don’t flirt with the 70-degree mark.