Tailwater · Gravel · Alberta, CA

Bow River — Calgary (Bearspaw to Policeman's Flats)

Bow River — Calgary (Bearspaw to Policeman's Flats) — #5664 Bow River Canada

The Bow is a world-class wild-trout river running straight through Calgary, cold and nutrient-rich below Bearspaw Dam and stuffed with big, wild brown and rainbow trout that have never seen a stocking truck.

Tomorrow · About as good as it gets
Czech Nymph
Forecast · Tomorrow
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Tomorrow
Live gauge
Level
Steady
0.83 m
Dropping in the last 6h
Water temp10.9°C
ClarityClear
Weather0°C
WindN 10 km/h
Pressure1014 hPa
Rain · recent2.9 mm
Rain · ahead0.7 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Ideal
11°C est.ideal 10–16°C
0°14°28°

We have not characterised this dam's release, so this is a general cold-release figure and could be several degrees out in either direction. Treat it as a hint, not a reading, and check locally before you fish.

How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Excellent — water temperature is right today, though time of day could be better.
Likely species
Mayflies
Chironomids
Damselflies & dragonflies
Gammarids
Hatch timeline · tomorrowPeak at 11am

12pm(now) — Western Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 67%
Also:Black Midge47%
Peak emergence windowWeather boost6 food groups active

Peak activity at 11am — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
2
1
Western Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Pale Morning DunHatch
2
3
3
2
TricoHatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Reach-specific gear/harvest rules — largely C&R and bait-restricted
  • Verify current Alberta regs (Zone ES1).
What's coming
Plan ahead
5-day outlook
Other water nearby · 4
Bow River — below Calgary (McKinnon Flats to Carseland)
24 km
84
Brown trout · Rainbow trout
Elbow River
43 km
Cutthroat trout · Bull trout · Rainbow trout
Sheep River
50 km
Cutthroat trout · Bull trout · Rainbow trout
Highwood River
57 km
Cutthroat trout · Bull trout · Rainbow trout
Gallery · 2
  1. Bow River — Calgary (Bearspaw to Policeman's Flats) — #5664 Bow River Canada
    #5664 Bow River Canada
  2. Terrain map of the venue
    Terrain map
About this water

The Bow is a world-class wild-trout river running straight through Calgary, cold and nutrient-rich below Bearspaw Dam and stuffed with big, wild brown and rainbow trout that have never seen a stocking truck. It fishes all year and is mostly a float game: long riffles and seams, prolific hatches, and fish that pull hard. Summer brings strong hatches and hopper fishing; the shoulder seasons reward streamers and nymphs through the deeper runs. Release these fish — they're the whole reason the river is what it is.

Under the surface

The Bow through Calgary is one of the great trout rivers of the world hiding in plain sight in a city of a million-plus people. Below Bearspaw Dam it runs cold, clear and astonishingly rich — treated municipal nutrient input and dam-buffered flows grow wild brown and rainbow trout to remarkable size and density, with no stocking. It's a big, powerful, even-flowing river of long riffles, drop-offs and bankside seams, fished mostly from a drift boat through the city and the prairie-edge reaches downstream. Prolific hatches and big, hard-fighting wild fish make it a destination in its own right.

Wading: Big volume, strong current, drop offs — much of it is float water

  • Gravel
  • Partly confined
  • Pool riffle
  • Large river
Conservation note

Wild, self-sustaining brown and rainbow trout (no stocking) — the value is releasing these fish. Bull trout (a char, zero limit province-wide) and mountain whitefish are present and are not harvest targets. Whirling disease is present in the Bow basin — Clean-Drain-Dry gear.

The full read · show the working · for Brown Trout · confidence 90%
How the 88 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow95 × 22%20.9
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity71 × 12%8.5
Conditions total= 88
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Euro Nymphingsubsurface methods
Booking & contacts