Pale Morning Dun
The PMD is the dominant mayfly hatch of Western trout rivers, providing consistent surface activity from late spring through summer.
Top fly patterns
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Month-by-month activity
Number of rivers where the Pale Morning Dun hatch is active each month.
Rivers where Pale Morning Dun hatches
How to fish the Pale Morning Dun
Match the specific emergence stage: nymph with a Rainbow Warrior in the morning, switch to Comparaduns as duns come off midday, then fish Rusty Spinners in the evening film. Size 16–18. Fine tippet (6X) on flat water is non-negotiable.
Frequently asked
When does the Pale Morning Dun hatch?
Peak emergence: May, June, July, August. Timing varies by elevation, latitude, and water temperature.
What flies match the Pale Morning Dun hatch?
Top patterns: Pale Morning Dun (size 16-18); Pale Evening Dun (size 14-18); Rainbow Warrior (size 16-20).
What rivers have a good Pale Morning Dun hatch?
Pale Morning Dun hatches are documented on 32 rivers including: Westfield River, Ausable River, Gallatin River, Madison River, Missouri River and 27 more.
How do I fish the Pale Morning Dun hatch?
Match the specific emergence stage: nymph with a Rainbow Warrior in the morning, switch to Comparaduns as duns come off midday, then fish Rusty Spinners in the evening film. Size 16–18. Fine tippet (6X) on flat water is non-negotiable.
What is the Pale Morning Dun?
The PMD is the dominant mayfly hatch of Western trout rivers, providing consistent surface activity from late spring through summer. Family: Mayfly (Ephemerellidae).
Related
Fly recommender · All hatches · All fly patterns · All rivers