Wyoming Hatch Chart
Which insects hatch on Wyoming rivers each month, when they peak, and the flies to match.
- 11Hatches
- 2Hatching in November
- 12Watersheds
Hatching in November
-
MidgeMidge
WD-40 #22–28
-
Blue-Winged OliveMayfly
Comparadun #18–22
Wyoming hatch calendar
Every hatch on the 12 watershed hatch charts of Wyoming's rivers, month by month.
| Hatch | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Flies | Water temp |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Midge Midge Chironomidae | In season | Peak | In season | In season | Peak | WD-40 #22–28 | 34–65°F | |||||||
| Blue-Winged Olive Mayfly Baetis sp. | In season | Peak | In season | In season | Peak | In season | Comparadun #18–22 | 44–58°F | ||||||
| Skwala Stonefly Stonefly Skwala americana | Peak | In season | Chubby Chernobyl #8–10 | 44–54°F | ||||||||||
| Mother's Day Caddis Caddis Brachycentrus sp. | In season | Peak | Elk Hair Caddis #14–16 | 48–58°F | ||||||||||
| Pale Morning Dun Mayfly Ephemerella inermis | In season | Peak | Peak | In season | Sparkle Dun #16–18 | 55–68°F | ||||||||
| Salmonfly Stonefly Pteronarcys californica | Peak | In season | Chernobyl Salmonfly #4–6 | 50–60°F | ||||||||||
| Golden Stonefly Stonefly Hesperoperla pacifica | Peak | In season | Stimulator #6–8 | 55–65°F | ||||||||||
| Green Drake Mayfly Drunella grandis | Peak | In season | Paradrake #10–12 | 55–65°F | ||||||||||
| Hopper Season Terrestrial Melanoplus sp. | In season | Peak | In season | Dave's Hopper #8–12 | 65–78°F | |||||||||
| Trico Mayfly Tricorythodes sp. | In season | Peak | In season | Trico Spinner #22–26 | 60–72°F | |||||||||
| Mahogany Dun Mayfly Paraleptophlebia sp. | Peak | In season | Comparadun #16 | 52–62°F |
- In season
- Peak
- This month
A month is marked when any of the watershed charts lists the hatch, and as a peak when most of them peak then. Smaller streams often see lighter or later hatches.
River hatch charts in Wyoming
Wyoming hatch FAQ
What are the main hatches in Wyoming?
Midge, Blue-Winged Olive, Skwala Stonefly, Mother's Day Caddis, and Pale Morning Dun are on the most watershed hatch charts across Wyoming's rivers.
When is the best hatch fishing in Wyoming?
July, when 5 of the 11 hatches on the chart are on the water. Check local reports: weather moves every hatch.
Where does this hatch chart come from?
From the hatch charts of the 12 watersheds Wyoming's rivers run through. A month is marked when any of them lists the hatch, and as a peak when most of them peak then.
