Blackfoot River Fishing Report, July 28, 2026

2026-07-28 (July 28, 2026)

Regional summary

Little has changed on paper since the last report, and that is exactly the story: the late-July regime that arrived with the July 22 restrictions has settled in and hardened. The entire Bitterroot mainstem and the Upper Clark Fork (Warm Springs and Silver Bow confluence down to Flint Creek) remain under hoot owl, closed to angling from 2:00 p.m. to midnight. Flows took another step down across the board this week, clarity is gin, and the productive hours contracted again. Lightweight now posts a 6:00 to 10:30 a.m. best window, a half hour earlier on both ends than a week ago. What did change is on the water, not in the rules. Spruce moths went from rumor to results, with fish eating them mid-morning on the Blackfoot and Rock Creek. Tricos have taken real ownership of the glassy morning water, PMD spinner falls anchor first light, caddis still close the day where the rules allow, and the terrestrial bench of hoppers, ants, and beetles is now the main event rather than the warm-up act. One more thing the week's storms left behind: new wood. Fresh downed trees are being reported on the Clark Fork, and every shop in town is telling floaters to expect the unexpected around blind corners. Carry a thermometer, fish the dawn, and read the FWP restrictions page before every launch.

At a glance: Low, clear, classic summer character | ~990–1,020 CFS at Bonner (down from ~1,270) | 70°F midday | dropping and clear | GH rating: 3/5 | Best window: 6:00–10:30 a.m. | No hoot owl, but floating is closed from Weigh Station to the I-90 crossing through October 31

Float hazard: obstruction on the North Fork below Harry Morgan. The blockage has already caused several boat accidents. Walk your boat around it or launch at River Junction instead, and confirm current conditions before you commit to the float.

The Blackfoot is wearing its midsummer uniform: low, crystal clear, and honest only in the morning. Trout have collapsed into the places that breathe, which on this river means deep plunge pools, heavy boulder pockets, fast inside seams, and the grassy cutbanks where the current delivers a steady conveyor of terrestrials. The floating closure from Weigh Station down to I-90 (a railway bridge project, in force through October 31) still shapes every float plan; you can take out at Weigh Station but not put in there, so build your day upstream of it. Temperatures are hitting 70 at midday, which makes the early start a conservation measure as much as a tactical one. Storms rolled through this week, so keep an eye out for new trees that were not there on your last trip.

Best techniques

• Search with the foam-and-dropper rig: a #8-12 Chubby Chernobyl, Sweetgrass Hopper, Henneberry Hopper, Juicy Hopper, or Water Walker on top, trailing a Prince Nymph, Jigged Hare's Ear, Duracell, Frenchie, Pat's Rubber Legs, Zirdle, Shuck It, or Jig PT two to three feet down. Start deep at first light and shorten as fish climb the column.
• Mid-morning belongs to the spruce moth now. Billy's Butterfly, Potter's Fat Head, and the Snowshoe Moth are fooling fish once the sun warms the timber. In the afternoon shift, go small terrestrial: a CFO Ant, Glitter Ant, Heifer Hopper, Morrish Hopper, or Plan B tight to the cutbanks, and a single foam ant or beetle for the tailout risers at dawn.
• Watch the soft water early for PMD spinner sippers and Tricos, and keep a Purple Haze, X-Caddis, Elk Hair Caddis, or Parachute Adams rigged for the evening caddis push. When the surface quits, swim something small and flashy through the plunge pools: a Sir Sticks-A-Lot, Space Invader, Sparkle Minnow, or Goldie. The Kingfisher crew posts the sharpest weekly read on this river, and their shop wall answers the question the gauge cannot: which bug the fish actually voted for this morning.

Hatches

Terrestrials lead the card: hoppers, ants, and beetles daily, with spruce moths now producing mid-morning in the timbered stretches. PMD spinner falls early on the slicks, Tricos in the calm water, Yellow Sallies through late morning, caddis at dusk, nocturnal stones at first light, and the last drakes fading.

The Fly Box

Nymphs: Pat's Rubber Legs, Double Bead Stones, Zirdles, Prince Nymphs, Duracells, Frenchies, Shuck Its, Jigged Hare's Ears, Jig PTs, Split Case PMDs, Perdigons, Caddis Pupa

Dries: Chubby Chernobyls, Sweetgrass Hoppers, Henneberry Hoppers, Juicy Hoppers, Heifer Hoppers, Morrish Hoppers, Water Walkers, Billy's Butterfly, Potter's Fat Head, Snowshoe Moth, CFO Ants, Glitter Ants, Plan Bs, PMD Spinners, Tricos, Yellow Sallies, Elk Hair Caddis, X-Caddis, Purple Haze, Parachute Adams

Streamers: Sparkle Minnows, Swim Coach, Mini Dungeons, Peanut Envy, Sculpzilla, Thin Mints, Woolly Buggers, JJ Specials, Sir Sticks-A-Lots, Space Invaders, Goldies

Outlook. Hot near Ovando through the weekend with highs in the 90s, then more of the same with sun into next week. The morning-only rhythm holds, the spruce moth bite should widen, and the terrestrial fishing keeps building as long as the grass keeps baking.

Sources and Thanks

Shop	Report date	Coverage
Kingfisher Fly Shop	July 27, 2026	All four rivers (freshest)
Blackfoot River Outfitters	July 24, 2026	All four rivers
Grizzly Hackle	July 26, 2026	All four rivers
Lightweight Fly Shop		All four rivers, consolidated weekly
The Missoulian Angler	July 26, 2026	All four rivers, background