Bow River Fishing Report
Week of August 27, 2026
By Dan King · Lead Guide, King Trout OutfittersBow River fishing conditions for the week of August 27, 2026 are good. Flow is 93 cubic meters per second and stable. Water temperature is 17°C. No angling restrictions are in effect. Active hatches include Trico, Terrestrials (Hoppers/Ants/Beetles), Blue-Winged Olive (BWO), Caddis.
Do You Need a Boat to Fish the Bow River?
You can wade the Bow in spots, but most of the best water sits along banks and seams you can only reach by drift boat. That is why guided trips here run from a boat. It covers miles of productive water in a day and keeps you safer when flows are up, like the 93 cms running this week.
What Are Conditions Like on the Bow River This Week?
Dan here. The Bow's running 93 cms and it's been dead stable for weeks, parked right on that 90 cms baseline with no rain or runoff to move it, so this is the low, clear, settled river at its most predictable. Best wading of the year. The big thing this week is the calendar. September starts Monday, the nights are cool now, and you can feel the water losing the last of its summer heat. The fishing's genuinely good and it's about to get better. Tricos are still peaking on the calm mornings, best up above Bearspaw where the water stays coldest, the hoppers are in their last strong stretch tight to the grass banks in town, and here's the real shift: the fall BWOs are coming on. Grab a grey afternoon and you'll get a proper olive hatch with heads up in the flat water. Down low it's still a first-light deal, so land them fast and keep them wet. No official closure as I write this, but on a hot afternoon temperature still runs the show, so check My Wild Alberta the morning you head out. And the honest truth: September is filling up fast. Cool water and fall browns is the best fishing of the whole year, so if you want a float, grab a date now.
What Flies Are Working on the Bow River Right Now?
Right now the trout are keyed on Trico, Terrestrials (Hoppers/Ants/Beetles), Blue-Winged Olive (BWO), Caddis. That is why our guides are fishing patterns like Trico Spinner, Foam Hopper, BWO Parachute this week. Match what is hatching, get a clean drag-free drift, and you will move fish. The full fly chart for this week is right below.
What Hatches Are Active on the Bow River?
| Insect | Hook Size | Activity |
|---|---|---|
| Trico | #20-24 | heavy |
| Terrestrials (Hoppers/Ants/Beetles) | #8-16 | moderate |
| Blue-Winged Olive (BWO) | #18-22 | moderate |
| Caddis | #14-18 | light |
What Flies Are Working This Week?
No restrictions this week. Fish from dawn to dusk. The best window is mid-morning through late afternoon when the hatches are active and the water has warmed a few degrees.
Where Should You Fish the Bow River This Week?
Upper Bow
Above Bearspaw DamAbove Bearspaw is still the coolest, most reliable water on the river, and the small-fly fishing up here is as good as it gets. The Ghost feeds cold water in at the top, so this reach keeps working all day when the rest of the Bow wants an afternoon nap. Tricos are still the headline on the calm mornings. The spinner fall drops an hour or so after the sun hits the water, and when the fish lock on you're throwing a #20 to #24 spinner on a leader longer and lighter than feels right. Size down as the fall thins toward the end of the month. At 93 cms of gin-clear water you get one clean drift before a fish slides off, so kneel down, pick one, and make it count. But the real change up here is the afternoon. On a grey day the fall BWOs are coming off now, not just showing, and a #18 parachute through a riffle is turning honest fish. When the Tricos taper off late morning, a small hopper with a Pheasant Tail a couple feet under works the inside seams.
City Section
Bearspaw to CarselandTown water is fishing well, and the cooler nights have quietly put the midday window back in play. The mornings don't slam shut by lunch the way they did in the heat of early August. The hoppers are into their last strong stretch, so work a foam bug tight to the grass banks, inches off the edge and not feet, and if a brown flashes it and turns away, hang a small ant or beetle behind it to close the deal. That's the whole game along Carburn and down through Policeman's Flats. The bigger news is the BWOs. Catch an overcast afternoon now and you'll get a real fall olive hatch, heads up in the flat water, a #18 to #20 parachute right in their lane. Evening caddis is still trickling off in the last hour of light, thin but enough to lift a few fish. Only a hot bluebird afternoon still asks you to back off the warmest hours, and even those are getting shorter.
Lower Bow
South of CalgaryMcKinnon Flats to Carseland is the warmest water on the river, so it's still a first-light program down here, but the cooling nights are pulling the edge off the afternoon warmth faster now. Launch early, fish the cool hours hard, and read the day. The steadiest thing going is a hopper-dropper worked tight to the banks in that early cool, and swinging an Olive Woolly Bugger through the deeper runs before the sun lands still turns the biggest fish of the morning. The lower-river browns are strong and healthy, and with the water cooling into September they're starting to think about the fall. Land them quick, keep them wet, pop the hook, and let them swim off with gas in the tank. When the water's this low, fighting a fish into the afternoon warmth can still hurt it, so if the day heats up, you're done down here by early afternoon.
What to Bring This Week
Clothing
- ✓Layers (mornings are cold, afternoons warm up)
- ✓Rain shell (mountain weather shifts fast)
- ✓Polarized sunglasses
- ✓Hat and sunscreen
Included in Your Trip
- ★Fly rod, reel, and line
- ★Waders and boots (all sizes)
- ★All flies and leaders
- ★Drift boat and guide
Sources & Data
King Trout Gear
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Book a Guided Bow River Fishing Trip
Conditions are good. Half day from $525, all gear included. Book a guided trip and let Dan put you on the fish.