Missouri River Fishing Report, May 16, 2026

Summary

The Missouri is in an early-summer pose, two to three weeks ahead of the calendar, with low water making it behave more like a freestone. Flow has nudged up to 3,300 CFS and the first PMDs are showing alongside fading caddis and BWOs. With western Montana rivers blown out on snowmelt, expect crowds and lead with courtesy on the water.

At a glance: ~3,300 CFS at Holter, rising | Clear, tailwater normal | 52 to 53°F at the dam, near 60°F downriver | Cool and unstable, 50s to 60s, a chance of snow showers Sunday and Monday, warming midweek | BWOs waning, caddis past peak, March Browns, midges, PMDs starting

The Missouri is sitting in an early-summer pose with the calendar two-to-three weeks ahead of historical schedule. Flow has nudged up to ~3,300 CFS at Holter (Trout Shop's May 14 number, up from ~3,150 on May 12 at Headhunters), water temp is holding in the low 50s at the dam but spiking toward 60 °F well downriver, the Trout Shop's Tim Linehan noted the low water is making the Mo behave "more like a freestone, " warming during the day and cooling overnight rather than the usual stable tailwater profile.

Weather is the headline shift since midweek. The 80 °F summer-like stretch has given way to seasonal 50s to 60s; the Trout Shop and Wolf Creek Angler are both calling for unstable, windy days through the weekend, with overnight lows potentially dipping into the 30s and snow showers possible Sunday and Monday before warming back into the 60s to 70s by midweek. That cooling, paired with the wind, will push the surface feed deeper and lengthen the morning subsurface window.

The hatch board has continued its early-calendar march. The Mother's-Day-caddis event has come and gone for most of the river per Wolf Creek Angler, though the Trout Shop still rates caddis as "rolling along" downriver. BWOs are lingering but the heaviest part of that hatch is behind us. March Browns continue to mix in. And PMD noses are out, Headhunters logged the first peek on May 12, and the Trout Shop confirms PMDs and caddis "flourished" in the recent warm water. With the western rivers blown on snowmelt, boat traffic on the Mo is at its busiest stretch of the season; Headhunters' Mark Raisler made a direct ask for courtesy in his report, communicate with other anglers before tension sets in.

Three columns are all in play. Nymphing remains the bread-and-butter; the dry-fly window is opening reliably mid-afternoon under BWO and caddis activity (with wind pushing more of that bite below the surface); and low-light streamer fishing is producing big-shouldered browns for those willing to work for them.

Best techniques

• Nymphing is the default. Two-nymph rigs in-line are the standard; light water has favored lightly weighted or unweighted setups. Cross Currents's depth protocol: 6 to 7 ft deep in the morning with a worm or sow as the lead fly, then 3 to 5 ft in the afternoon as fish key on emerging bugs in the upper column. Trout Shop reinforces sows and worms as the morning starting lineup.
• Dry-fly window opens with BWO and caddis activity mid-afternoon and stretches to dark. With cooler, windier days incoming, expect more of the bite to stay subsurface, soft-hackle and emerger swings are the right answer when fish aren't showing.
• Reach cast / slack-line presentation for risers, on anchor or on foot. Straight-line presentations fare worse. 9-ft leader minimum, 4X or 5X to the bug, clean drag-free drift.
• Dry-dropper with a Mini Chubby or larger mayfly up top, suspending a small nymph below, the go-to in skinny water and an effective searching rig everywhere. Watch the speed differential between the surface fly and the nymph drift.
• Soft-hackle swing time is mid-morning to early afternoon. The Trout Shop's worked example: Tung Dart (Silver Bead Gold, caddis pupa) over a Partridge and Yellow soft hackle (PMD imitation), targeting shelves and bucket water on a trout spey rig.
• Streamers work the whole gamut, dry-line tossing, intermediate, and scraping the exposed center lanes with heavier flies. Drop-offs and mid-river buckets. WCA notes low-light is best. Be ready to swap profile and color until something clicks.

Hatches

The Fly Box

Nymphs: Green Machine, Two Bit Hooker, Psycho May, Frenchie, Blow Torch, Spanish Bullet, Pheasant Tail Nymph, Crust Nymph, Micro May, Split Case, Lightning Bug, Zebra Midge, Mercury Midge, March Brown Nymph, Pill Popper, UV Yum Yum, Soft Hackle Ray, Tailwater Sow, Wire Worm

Emergers: Partridge and Yellow, Sprout Baetis, Translucent Pupa

Dries: Chubby, Film Critic, Pederson's 401K Baetis, Adams, Purple Haze, Royal Wulff, Split Flag, Hi-Vis Rusty Spinner, Griffith's Gnat, Cornfed Caddis, X-Caddis, Missing Link Caddis

Streamers: Kreelex, Sparkle Minnow, Lil' Kim, Goldie, Skiddish Smolt, Sex Dungeon, Mini-Dungeon, Micro Dungeons, Micro Peanut Envy, Thin Mint, Bugger, Sparkle Bugger, Montana Intruder, Mini Sculpin, Space Invaders

BWO (Baetis): Nymphs: Green Machine (Wolf Creek's "PT Green Machines" included), Two Bit Hooker, Psycho May (PMD/Olive), Frenchie, Blow Torch (also Red Bead Blow Torch), Spanish Bullet (brown or olive), Pheasant Tail Nymph (size 12 plus Tung Jig Pheasant Tail), Tung Jig Hare's Ear, Crust Nymph, Black IPT, Micro May, Throat Lozenge, Split Case, Purple Weight Fly, Magic Fly, Redemption, Gold Lightning Bug, PMD Perdigon. Emergers / Cripples: Sprout Baetis, Film Critic, Translucent Emerger. Dries: Pederson's 401K Baetis, Adams, Purple Haze, Purple Para Wulff, Royal Wulff, Sparkle Flag, Split Flag, Brianne Dun, CDC Para Spinner, Hi-Vis Rusty Spinner, BWO Spinner, Harrop Olsen PED Blue Wing

Midge (Chironomidae): Nymphs / Pupae: Zebra Midge, Mercury Midge, Tufted Zebra, Midge Larva. Adults: Griffith's Gnat, Buzzball

March Brown: March Brown Nymph in #12 to 14 paired with a smaller BWO nymph remains a productive stack. Surface play: March Brown Parachute

Caddis: The Mother's-Day-caddis event has come and gone for most of the river per Wolf Creek Angler; the Trout Shop still sees caddis "rolling along" downriver. On bright days the hatch pushes later into the evening; the wind forecast will likely keep the strongest action on emergers and pupae below the surface. Pupae / Emergers: Tung Dart (Silver Bead Gold), Translucent Pupa. Dries: Cornfed Caddis, X-Caddis, Missing Link Caddis, Hi-Vis Spent Caddis, Jeb Caddis

PMD: Headhunters' first PMD sighting of the season was May 12; the Trout Shop confirms PMDs flourished in the recent warm water. The cooling stretch may stall the hatch slightly, but PMD nymphs in the rotation now will pay dividends when the warm window returns midweek. Soft hackle: Partridge and Yellow (PMD), PMD Soft Hackle

Sows & scuds: Pill Popper, TFP Skurp, UV Yum Yum, Soft Hackle Ray (red bead), Pink Bead Tungsten Epoxy Back Sow, Tailwater Sow (natural grey and rainbow)

Worms: Wire Worm as the deep lead-fly in the morning is the consensus recommendation across Cross Currents and the Trout Shop right now

Streamers: Flashy: Kreelex (all colors, plus Kreelex Minnow), Sparkle Minnow, Lil' Kim, Goldie, Finch's Red Delicious. White / smolt: Skiddish Smolt. Dark / leechy / sculpin: Sex Dungeon (including big white Dungeon for the bold), Mini-Dungeon, Micro Dungeons, Micro Peanut Envy, Bam Bam, Thin Mint (Thin Mint Bugger), Heisenberg, Sparkle Bugger, Mini Montana Intruder, Mini Sculpin, Trout Spey Bugger, Squirrel Leech, Peacock and Black Bugger, Fruit Roll Up, Space Invaders, Gamechanger, SOL's Streamer Sushi Roll

Outlook. Cool and unstable through the weekend, highs in the 50s to 60s with gusty wind, overnight lows possibly dipping into the 30s to 40s and a chance of snow showers Sunday and Monday, before warming back into the 60s to 70s by midweek. Expect the caddis picture to soften under the cool stretch, BWOs to continue thinning, March Browns to hold steady, and the PMD hatch to pause briefly before reasserting when warmth returns. Water managers' projected 10 to 20 % flow bump for June/July (to ~3,500 CFS) remains the favorable scenario. Crowds will stay heavy for the next six weeks as western Montana rivers continue to run off, courtesy on the water pays. Little Prickly Pear Creek opens Saturday for those looking to slip off the main river.

Sources and Thanks

Shop	Report date	Coverage
Headhunters Fly Shop (Craig)	May 12, 2026	Missouri River
The Trout Shop (Craig)	May 14, 2026	Missouri River
Cross Currents Fly Shop (Craig)	May 7, 2026	Missouri River
Wolf Creek Angler (Wolf Creek)	May 14, 2026	Missouri River