This is the hatch chart for Hat Creek in Western California.
| Common Name | Dates of Emergence |
| Blue-Winged Olive | May 25 - Aug. 25 |
| Pale morning Dun | May 1 - June 30 |
| Pale Evening Dun | June 1 - July 30 |
| Green Drake | May 1 - June 30 |
| Trico | June 1 - Oct. 31 |
| October Caddis | June 1 - July 30 |
| October Caddis | Oct. 1 - Oct. 31 |
| Salmonfly | Apr. 1 - May. 30 |
| Golden Stonefly | Apr. 1 - May. 30 |
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