All Hatch Charts

Bow River near Cochrane

Southern Alberta · 8 active this month

Bow River near Cochrane Hatch Calendar

Last reviewed 2026-05-21

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

August hatches

No photo available

Pale Morning Dun

Ephemerella inermis

Air 14–28°C (optimal 16–26°C)Water 12–18°C (optimal 13–17°C)

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

No photo available

Yellow Sally

Isoperla spp.

Air 16–32°CWater 12–20°C

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

No photo available

Green Sedge

Rhyacophila spp.

Air 14–28°CWater 10–18°C

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

Flying Ant

Flying Ant

Formicidae

Air 15–35°C (optimal 20–30°C)Water 10–22°C

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

Midge

Midge

Chironomidae

Air -5–25°C (optimal 5–18°C)Water 2–20°C (optimal 4–15°C)

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

No photo available

Spotted Sedge

Hydropsyche spp.

Air 16–30°CWater 12–20°C

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

No photo available

Trico

Tricorythodes spp.

Air 16–30°C (optimal 18–28°C)Water 14–22°C (optimal 15–21°C)

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

Grasshopper

Grasshopper

Acrididae

Air 15–35°C (optimal 20–30°C)Water 10–22°C

Foothills mainstem between Banff and Calgary. Similar hatch progression to lower mountain Bow.

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