The Madison dropped 21% in a week. If that doesn’t get you off the couch and into waders this weekend, I don’t know what will.
Rivers across the state are finally falling into fishable shape after the latest runoff pulse, and the timing is about as good as it gets. We’ve seen sharp declines across the board over the past seven days — some rivers down 20-30% — with water temps holding in that sweet 55-58°F zone where trout wake up and start doing stupid things. There’s a scattered storm chance Saturday in Southwest Montana, but honestly, the overall picture is looking about as promising as mid-June gets around here.
Here’s your quick-reference gauge snapshot for June 18:
| River | CFS | Temp (°F) | Trend |
|---|---|---|---|
| Madison River | 349 | 57.9 | Falling sharply |
| Gallatin River | 1,210 | — | Falling sharply |
| Yellowstone River | 7,230 | 55.2 | Falling |
| Big Hole River | 1,010 | 55.6 | Falling sharply |
| Missouri River | 2,590 | 64.2 | Falling sharply |
| Clark Fork River | 3,930 | 57.7 | Falling sharply |
| Bitterroot River | 5,050 | 57.6 | Stable |
| Blackfoot River | 2,740 | 57.9 | Falling sharply |
Madison River — Absolutely Prime Right Now
Current Conditions: 349 cfs, 57.9°F, falling sharply (down 21% from last week)
This is about as good as it gets on the Madison. We dropped from 492 cfs on June 10th down to 349 today, and at 58°F the trout are active and eating. Visibility is excellent. The river’s already fishing like mid-summer, which almost never happens this early in June. Whether you’re wading or floating a drift boat, these flows work.
What’s Working: The PMD hatch is in full swing, with solid surface action running from late morning into mid-afternoon. A size 16-18 Sparkle Dun or Comparadun worked through the slower seams is hard to beat right now. Nymphing remains deadly too — especially in the deeper runs between Ennis and McAtee Bridge. Drop a size 14 Pheasant Tail under a Chubby Chernobyl and you’ll find fish. Early mornings, before the hatch gets going, swing a black or olive Woolly Bugger through the deeper pockets and don’t be surprised when something big grabs it.
Access Tips: The $3 Bridge, Varney Bridge, and McAtee are all fishing well. Wade fishermen should target the Raynolds Pass area, where the pocket water is finally walkable. One thing to keep in mind — afternoon winds are forecast to gust to 23 mph today. Get out early if you want to fish dries, or commit to nymphing and let the wind work against the other guy.
Gallatin River — Coming Into Shape
Current Conditions: 1,210 cfs, temperature unavailable, falling sharply (down 17%)
The Gallatin has dropped a long way from the 1,600+ cfs we were looking at last week. At 1,210 it’s transitioning from “forget it” to fishable, though it’s still running high and colored compared to the Madison. No temp reading available, but based on regional data we’re probably sitting in the mid-50s — good enough. In my experience, the Gallatin fishes better on the way down than people give it credit for, as long as you’re targeting the right water.
What’s Working: Skip the dry fly box for now and stick to nymphing the clearer pockets and bank edges where visibility is better. Big, high-visibility attractors like Pat’s Rubberlegs in tan or black will get attention when fish can’t see much. Your best bet is the stretch from Gallatin Gateway down toward the mouth — the canyon is still running pushy and technical. Streamers are also worth a shot near any structure you can find. The dry fly action will come, but this river needs another few days of this trend before the top-water game opens up.
Outlook: Another week of stable weather and the Gallatin should be fishing as well as anywhere in the state. Keep an eye on flows through the weekend.
