All Hatch Charts
Bow River near Banff
Southern Alberta · 3 active this month
Bow River near Banff Hatch Calendar
Last reviewed 2026-05-21
Glacial influence — hatches run 1–2 weeks later than Calgary reach. BWOs and midges primary early season.
October hatches
Midge
Chironomidae
Moderatemedium
#18-263-12 mm
Air -5–25°C (optimal 5–18°C)Water 2–20°C (optimal 4–15°C)
Glacial influence — hatches run 1–2 weeks later than Calgary reach. BWOs and midges primary early season.
Blue-winged Olive
Baetis spp.
Highmedium
#18-225-7 mm
Air 8–18°C (optimal 10–16°C)Water 5–12°C (optimal 6–11°C)
Glacial influence — hatches run 1–2 weeks later than Calgary reach. BWOs and midges primary early season.
October Caddis
Limnephilidae
Highmedium
#8-1212-20 mm
Air 8–18°CWater 6–12°C
Glacial influence — hatches run 1–2 weeks later than Calgary reach. BWOs and midges primary early season.