All Hatch Charts

Bow River at Calgary

Southern Alberta · 14 active this month

Bow River at Calgary Hatch Calendar

Last reviewed 2026-05-21

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

July hatches

Salmonfly

Salmonfly

Pteronarcys californica

Moderate-Highmedium

Air 14–28°CWater 10–16°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Grasshopper

Grasshopper

Acrididae

Moderate-Highmedium

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

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Brown Dun

Brown Dun

Ameletus spp.

Air 12–22°C (optimal 14–20°C)Water 8–14°C (optimal 9–13°C)

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Flying Ant

Flying Ant

Formicidae

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

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Beetle

Coleoptera

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

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Green Drake

Green Drake

Drunella grandis

Low-Moderatemedium

Air 16–30°C (optimal 18–28°C)Water 14–20°C (optimal 15–19°C)

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Midge

Midge

Chironomidae

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

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial 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)

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

Golden Stonefly

Golden Stonefly

Perlidae

Air 16–30°CWater 12–18°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Yellow Sally

Isoperla spp.

Air 16–32°CWater 12–20°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Spotted Sedge

Hydropsyche spp.

Air 16–30°CWater 12–20°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Green Sedge

Rhyacophila spp.

Air 14–28°CWater 10–18°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Trico

Tricorythodes spp.

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

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

No photo available

Sow Bug

Asellus

Air 10–28°CWater 8–22°C

World-class blue-ribbon reach. Full spectrum of mayfly, caddis, stonefly, and terrestrial hatches.

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