Hatch Charts
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Click on image to see Hatch Chart
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Stoneflies
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Salmon Fly (Pteronarcys Californica) Hook Size 4, 6, 8- Gunnison River (Black Canyon) - - - - - - - - - - June 20 to July 1
Golden Stonefly (Acroneuria Pacifica) Hook Size 6, 8, 10- Gunnison River (Gunnison - Almont) - - - - - - - - - - mid-April to June 30
- Taylor River - - - - - - - - - - May 15 to June 30
- East River - - - - - - - - - - May 20 to June 30
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Mayflies
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Green Drakes (Ephemerella Drunella) Hook sizes 10, 12, 14- Gunnison River (Blue Mesa - Almont) - - - - - - - - - - June 20 to August 10
- Taylor River (Almont to Taylor Reservoir) - - - - - - - - - - July 4 to August 20
- East River - - - - - - - - - - - July 1 to August 10
- Backcountry Streams (Slate, Upper East) - - - - - - - - - - July 20 to August 20
Pale Morning Duns (Ephemerella inermis) Hook sizes 14, 16, 18, 20- Gunnison River (Blue Mesa - Almont) - - - - - - - - - - June 25 to August 20
- Taylor River - - - - - - - - - - - - -July 10 to August 20
- East River - - - - - - - - - - - - - July 4 to August 20
- Backcountry Streams - - - - - July 20 to August 20
Blue Winged Olives (Ephemerella cornuta) Hook sizes 14, 16, 18, 20- Gunnison River (Black Canyon) - - - - -April 15 to May 15
- Gunnison River (Blue Mesa - Almont) - - - - April 20 to runoff
- Taylor River - - - - - - - - -April 10 to 30, August 10 to October 10
- East River - - - - - - - - - - July 15 to September 15
Gray/Slate Drake (Siphlonurus occidentalis) Hook sizes 12, 14, 16- Gunnison River - - - - - - - - September 10 to October 10
- Taylor River - - - - - - - - - - - - September 15 to October 20
- East River - - - - - - - - - - - September 15 to October 20
- Backcountry Streams - - - - - - - - - - September 20 to October 25
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Caddisflies
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Caddis (Tricoptera) Hook sizes 10, 12, 14, 16, 18, 20- Gunnison River (Black Canyon) - - - - - - - - - -June 15 to August 30
- Gunnison River (Blue Mesa - Almont) - - - - - - - June 1 to September 1
- Taylor River - - - - - - - - - - - - - - - - - - - - - - -June 10 to September 1
- East River - - - - - - - - - - - - - - - - - - - - - July 1 to September 1
- Backcountry Streams - - - - - - - - - - - - - - - - - July 4to September 10
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Terrestrials
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- All Rivers - - - - - - - - - - - - - - - - July 15 to September 30
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