Missouri River Fishing Report, July 14, 2026

2026-07-14 (July 14, 2026)

Summary

Not much has moved on the Mighty Mo since last week, and on a tailwater in mid-July that steadiness is the whole point. The Tricos that turned on at the start of the month are now a daily event below Holter, and they set the clock for the entire day. Flows are holding right around 3,580 CFS out of the dam with water in the low 60s, the kind of consistency a regulated tailwater delivers, and the only real change is the calendar tipping deeper into the hottest stretch of the Montana summer. The pattern is simple and unforgiving: a strong Trico show in the morning, a dead lull through the blazing afternoon, and a second window in the evening on caddis and spinners. These fish have been picked over by anglers since spring, so this is genuinely A-game water, rewarding long leaders, accurate casts, and drag-free, fly-first drifts over brute force. Two midsummer developments are worth planning around: the weeds are thickening in the water column, which is nudging the good nymphing toward the center of the river and making streamer work fussier, and the first hoppers and ants are becoming a real option along the banks.

At a glance: Trico season locked in on the tailwater below Holter | ~3,580 CFS below Holter Dam, ~62°F (stable tailwater; USGS/Trout Shop) | hot, highs in the 90s | fish the morning Trico window and the evening, rest the baking middle of the day | educated fish, A-game presentations.

Neither fresh source broke the river into named sections this week, so this reads as one tailwater picture from Holter down through Craig. The fishing is good but demanding, and the honest read is that the morning is where the day is won. Trico numbers are strong: the hatching females draw fish from before sunrise to around 8 a.m., and then the mating columns drop and the male spinners hit the water in mass between roughly 9 and 10 a.m., which is the peak surface hour. Caddis and PMDs are around but play second fiddle to the Tricos, and the evening carries its own quieter window. Nymphers are working the center-river depths, where the trout have slid to hold in the cleaner lanes as the weed beds build along the margins.

Fish early, then rest the middle of the day. With water in the low 60s and afternoon highs in the 90s, the productive and responsible plan is one and the same: fish the morning Trico window, take the hot afternoon off, return for the evening. Carry a thermometer, and if the water climbs into the high 60s, give the fish a rest. The other midsummer reality is company: with the fishing this good in peak season, expect wade anglers on the prime flats and boats in every stretch, so a little courtesy goes a long way. Check Montana FWP for any heat-driven restrictions before you go.

Best techniques

• Morning Tricos are the show. Fish the hatching females before sunrise to around 8 a.m., then switch to spinners as the mating columns drop between 9 and 10 a.m. On calm days, single and double-wing Trico spinners, clusters, a Buzzball, or a Griffith's Gnat fool risers; when the wind comes up, fish a drowned or Sunken Trico, or hang a winged Zebra under an indicator or a Chubby.
• Nymph the center-river lanes with small stuff, and reach for the Zirdle as the weeds push fish to the middle. A double-Trico rig, Tufted Zebra, Little Black Mo, Little Green Machine, Frenchy, Black IPT, Two Bit Hooker, Split Case PMD, Spanish Perdigon, Fullback Napoleon, Micro May, Crust Nymph, or a natural gray or rainbow Tailwater Sow all produce, with a Blowtorch or Psycho May as a hot-spot anchor.
• The evening belongs to caddis and duns. Ahead of dark, look for sparse PMD para-spinners (CDC Para Spinner) and Translucent Caddis Emergers in the film, then Film Critics, Sparkle Flags, or Split Flags for evening duns, and Superman Caddis, High Vis Spent Caddis, or Stalcup's Adult Caddis when the caddis make their egg-laying flights. A Rusty Spinner is a good idea at last light. Streamers are tougher with the weeds coming in, but going against the grain with a Bam Bam, Thin Mint, Mini Montana Intruder, Mini Dungeon, Mini Sculpin, or a big white Dungeon can move an aggressive fish. Stop into the Trout Shop or Headhunters in Craig for the morning read; on educated tailwater fish, the daily fly-size detail is worth the visit.

Hatches

Tricos are the headline, the hatch and spinner fall driving the morning. Caddis are around, best in the evening egg-laying flights, PMDs are past their peak with a few evening duns still showing, and hoppers and ants are becoming a real midday option along the banks.

The Fly Box

Nymphs: Tufted Zebra, Flying Zebra, Little Black Mo, Little Green Machine, Frenchy, Black IPT, Two Bit Hooker, Split Case PMD, Spanish Perdigon, Fullback Napoleon, Micro May, Psycho May, Crust Nymph, Blow Torch, Tailwater Sow

Emergers: CDC Trico Emerger, CDC Trico Hanging Cripple, Sunken Trico, Translucent Caddis Emerger

Dries: Trico Spinners (single and double wing), Clusters, Buzzball, Griffith's Gnat, Chubby Chernobyl, PMD Para Spinner, Film Critic, Sparkle Flag, Split Flag, Superman Caddis, High Vis Spent Caddis, Stalcup's Adult Caddis, Rusty Spinner

Streamers: Bam Bam, Thin Mint, Trout Spey Bugger, Mini Montana Intruder, Mini Sculpin, Mini Dungeon, Micro Peanut Envy, Peacock & Black Buggers, White Dungeon, Zonker

Outlook. Hot and holding hot, with highs in the 90s keeping the day split between an early Trico window and an evening bite, and the baking middle best spent off the water. Expect the weeds to keep building through the water column, pushing the good nymphing to the center of the river and making streamer fishing more of a hunt. Terrestrials should matter a little more each day as the summer deepens. Play nice with the peak-season crowds, and let the water temperature set your schedule.

Sources and Thanks

Shop	Report date	Coverage
Headhunters Fly Shop	July 12, 2026	Missouri (freshest)
The Trout Shop / House of Fly	July 9, 2026	Missouri
Cross Currents Fly Shop	June 27, 2026	Missouri (background)
Wolf Creek Angler	June 19, 2026	Missouri (background)
Montana Fly Goods (Helena)	April 29, 2026	Missouri (background)
Montana Trout Hunters (Helena)	No current report	Missouri (coverage gap)