Greater Yellowstone, Montana
Madison River Fishing Report: May 16, 2026
The Upper Madison is falling near Kirby Ranch with cold, stormy weather ahead; nymphing near the cleaner upper river remains the main play.
- Status
- good
- Flow trend
- falling
- Best window
- Midday before heavier weather, then protected edges
- Best methods
- nymphs, streamers, dry flies
Quick Summary
The Madison is a good option where clarity holds, especially closer to Hebgen and Quake compared with lower tributary-influenced reaches. USGS showed 799 cfs at Kirby Ranch, down from the prior day, with water around 51 F. Weather is turning colder and wetter, so nymphing protected slots is the higher-percentage plan.
Conditions Snapshot
| Field | Value |
|---|---|
| Status | Good |
| Flow | 799 cfs at Kirby Ranch at 3:30 PM MDT; 383 cfs below Hebgen at 3:45 PM MDT |
| Water Temp | 51 F at Kirby Ranch; 51 F below Hebgen |
| Clarity | Variable; upper river usually cleaner than lower runoff-influenced reaches |
| Trend | Falling |
| Best Window | Midday before heavier weather, then protected edges |
| Best Method | nymphs; streamers; dry flies |
| Wadeability | Good in upper sections; use caution around changing tributary color and weather |
Weather
The Ennis and Cameron area had showers and thunderstorms likely late today, with cold rain and snow likely tonight. Sunday remains cold with rain and snow chances, which can improve runoff clarity but makes fishing uncomfortable.
River Notes
The river is not behaving the same from top to bottom. Upper sections near the lakes tend to hold better clarity, while lower reaches can change with tributary mud. Watch the West Fork and other tributary inputs before committing to a float or long wade.
Hatch Activity
| Hatch | Size | Notes |
|---|---|---|
| Baetis | 18-22 | Possible under clouds |
| Midges | 18-22 | Useful in softer tailwater-influenced water |
| Caddis | 14-18 | Carry if warmer breaks occur |
| Stoneflies | 6-10 | Nymphs remain more important than dries |
Recommended Flies
| Category | Fly | Size | Notes |
|---|---|---|---|
| Nymph | Pat’s Rubber Legs | 6-10 | Good lead fly in faster runs |
| Nymph | Beaded San Juan Worm | 10 | Useful during runoff influence |
| Nymph | Pheasant Tail | 12-16 | Mayfly nymph option |
| Streamer | White Zonker | 6 | Work banks and softer drop-offs |
| Dry | Parachute Adams | 12-22 | Use only when fish show |
Tactics
Start with stonefly and worm nymphs in soft seams, buckets, and inside bends. If you find clean water and rising fish, switch to baetis or small attractor dries. Avoid committing to lower dirty water when cleaner upper sections are available.
Gauge Links
| Gauge | Flow | Temp | Link |
|---|---|---|---|
| Madison River at Kirby Ranch near Cameron MT | 799 cfs | 51 F | USGS 06038800 |
| Madison River below Hebgen Lake near Grayling MT | 383 cfs | 51 F | USGS 06038500 |
Sources
Official sources checked: USGS stations 06038800 and 06038500 and the National Weather Service forecast for the Ennis and Cameron, MT area. This report is an original Custom FlyBox summary based on current official gauge and weather data, with local public conditions reports reviewed separately for hatch, access, and method context.