Bow River
Calgary to Carseland
Alberta, Canada
Open live forecast →Target species: Brown and Rainbow.
Stream gauge: 05BH004. Flow and water temperature update on every refresh.
Weekly AI Outlook as of 06/05/26
At 13,455 cfs, the Bow is running full but fishable through the Calgary stretch. Caddis are hitting their peak emergence window with water temps in that sweet 50-58°F range. PMDs are also active, creating excellent evening opportunities. Focus on nymphing during the day — as Bow River Fly Fishing Co notes, most trout food stays subsurface in this fast water. The evening caddis show from 7-9pm should be spectacular if wind cooperates, though Friday's 21mph gusts may push surface action later.
- Flow: 13,455 cfs — high but manageable. Wade carefully and focus on current breaks where trout can hold comfortably in the push.
- Hatches: Peak caddis emergence with PMDs joining the mix. Evening action 7-9pm when bugs move to surface and trout look up.
- Water Temp: 50-58°F range — ideal for trout activity. Caddis threshold well exceeded, PMD conditions perfect.
- Best Window: Nymph rigs all day, then switch to dries for the legendary evening caddis show. Avoid Friday's 21mph winds.
Generated weekly from live USGS gauge readings, weather forecasts, and recent fly shop reports. Updates Friday mornings.
About this Water
- Tailwater
- Best months: May–Oct, peak June–Sept
The Bow River flowing through Calgary and east through the rolling foothills of Alberta is one of North America's top urban trout fisheries — a counterintuitive description for a river that consistently produces trophy brown and rainbow trout. Below the Bearspaw Dam the Bow is a tailwater in character, with cold regulated flows and extraordinary fish densities. The river through Fish Creek Provincial Park and east to Carseland is an internationally known destination for large Bow River browns.
The Bow River's brown trout fishery is world-renowned — the river's unique combination of tailwater flows and abundant food production creates fish that regularly exceed 20 inches in the city limits.
January Outlook
January on the Bow River — the world-class Calgary trout fishery is in winter hibernation. Most sections are closed under Alberta regulations. Winter fishing is not available on the Bow below Calgary in January. Plan your spring and summer trips.
Productive Patterns
- Planning season — Bow River closed under Alberta regulations
- Tie flies
- Study hatch charts for April opening
Tips
The Bow River season below Calgary typically opens in April. January is for planning — study the PMD, Caddis, and Hopper timing for the coming season. The Bow's famous hopper fishing peaks in July–August. Book guide trips and accommodations early as the Bow is one of North America's most popular trout rivers.
Water Notes
Water 32-38°F. Closed season under Alberta regulations. Ice may cover portions of the river. Season opens April 1 on most sections.
February Outlook
February on the Bow River — still deep in Alberta winter and the closed season. The brown and rainbow trout that make the Bow famous are holding in deep winter lies. Planning season for spring opening in April.
Productive Patterns
- Planning season — Bow River closed
- Tie PMD and Caddis patterns for spring
- Book guide trips for June–August
Tips
February is the time to prepare for the Bow River season. Tie PMD Comparaduns, Elk Hair Caddis, and Parachute Hoppers for summer. The Bow's world-class brown trout fishing begins in April. Guide services in Calgary book up quickly for peak summer months — make reservations now.
Water Notes
Water 32-38°F. Alberta winter. Closed season on most sections. Season opens approximately April 1.
March Outlook
March on the Bow River — late Alberta winter. Some years see early season fishing open in late March. Pre-season anticipation builds. Ice breaks up on the river and the first BWO hatches of the year are weeks away. Season opening is typically April 1.
Productive Patterns
- Planning season (season opens April 1)
- Pre-season scouting
- BWO Parachute #18-20 (for April opening)
Tips
March is pre-season preparation time for Bow River fishing. Scouting the river for ice-free sections and reading conditions is worthwhile. Season typically opens April 1 on most sections. Check current Alberta regulations for exact dates. First BWO hatches usually begin within two weeks of opening.
Water Notes
Water 34-42°F. Ice-out conditions. Season opens April 1 on most sections. Check current Alberta regulations.
April Outlook
April marks the opening of the Bow River season below Calgary. BWO hatches begin on mild days. Large brown and rainbow trout begin actively feeding after the long winter. Nymphing is most consistent but dry fly opportunities emerge.
Productive Patterns
- BWO Parachute #18-20
- Pheasant Tail Nymph
- BH Hare's Ear
- Mercury Midge
Tips
Fish the slower runs and eddies where fish have been stacking all winter. Light tippet (5-6X) is necessary for picky spring fish. Water is typically clear and low.
Water Notes
Water 38-46°F. Pre-runoff conditions. The Bow is at its clearest in April. Fish are in winter lies in deep runs.
May Outlook
May brings excellent PMD and Caddis hatches on the Bow. Flows increase as snowmelt arrives but fish remain active. This is when the legendary Bow River fishing begins in earnest. Browns are preparing to feed aggressively.
Productive Patterns
- PMD Comparadun
- Elk Hair Caddis #14
- RS2
- Hare's Ear Soft Hackle
Tips
Fish the PMD hatch from 11am-3pm on the riffles and flats. Evening caddis can produce spectacular surface activity. Nymph between hatches.
Water Notes
Water 44-54°F. Runoff elevates flows in late May. Fish the slower water if flows blow out.
June Outlook
June delivers outstanding Bow River fishing as hatches peak. Caddis, PMDs, and the first pale evening duns appear. Brown and rainbow trout are in excellent condition. The evening fishing can be extraordinary.
Productive Patterns
- PMD Sparkle Dun
- X-Caddis #14
- Pale Evening Dun
- Caddis Pupa
Tips
The evening caddis hatch on the Bow is legendary. Fish from 7-9pm on warm summer evenings. Waders are required — the Bow is a large, fast river.
Water Notes
Water 50-58°F. Ideal temperature range for trout. June is arguably the finest month.
July Outlook
July is prime time on the Bow. Hopper season begins by mid-July. Trico hatches in the morning. Pale evening duns continue. The stretch from Calgary to Carseland is world-renowned for large wild trout.
Productive Patterns
- Parachute Hopper
- Trico Spinner (black)
- PMD
- Dave's Hopper
Tips
July hopper fishing along the grassy banks is exceptional. Large brown trout key on hoppers in the afternoon heat. Mornings are for trico and PMD hatches.
Water Notes
Water 56-62°F. Warm but comfortable. Long daylight hours — fish from 6am to 10pm.
August Outlook
August hopper fishing on the Bow is at its peak. The large trout that make this river famous are actively feeding on hoppers along the banks. Trico spinners in the morning are important. Evening conditions are prime.
Productive Patterns
- Dave's Hopper
- Parachute Hopper
- Trico Spinner
- PMX
Tips
Hopper fishing on the Bow in August is bucket-list caliber. Cast tight to the banks within 12 inches. Fish are sometimes taking hoppers in open view in shallow water.
Water Notes
Water 58-64°F. Long summer days. The Bow fishes well all day in August.
September Outlook
September is outstanding for large brown trout as pre-spawn activity increases. Autumn BWO hatches begin. Streamer fishing for aggressive pre-spawn browns is exceptional. The Bow corridor is spectacular in fall colors.
Productive Patterns
- Streamer (olive/white)
- BWO Parachute #18
- Egg Fly
- Hopper (early month)
Tips
Pre-spawn brown trout in September are aggressive. Fish streamers in the deep pools and runs. Early September hopper fishing continues.
Water Notes
Water 50-58°F. Fall cooling. Pre-spawn behavior begins in mid-September.
October Outlook
October is peak brown trout spawning season on the Bow. Large fish (5-8 lb) are visible on the gravel redds. Streamer fishing for off-redd fish is excellent. The river is at its most beautiful in October.
Productive Patterns
- Streamer (large/flashy)
- Egg Fly (orange/pink)
- BWO Parachute
- Woolhead Sculpin
Tips
Observe the spawning fish but do not target them on redds. Fish the deep pools below spawning areas for off-redd fish that are feeding on drifting eggs.
Water Notes
Water 44-52°F. Peak spawning season. Handle fish with care — minimize time out of the water.
November Outlook
November closes out the season on the Bow with excellent post-spawn fishing. Fish have recovered and are feeding aggressively on nymphs. Midge hatches keep some fish rising. Season closes October 31 on some sections — check regulations.
Productive Patterns
- Mercury Midge #20-22
- BH Pheasant Tail
- Sow Bug
- BWO Emerger
Tips
Post-spawn fish are depleted but hungry. Nymph the deep runs with small patterns. Midge hatches on warm afternoons. Season end varies by section.
Water Notes
Water 38-46°F. Cold and getting colder. Snow possible. Fish are recovering from spawn.
December Outlook
December on the Bow River is the off-season. Alberta winter arrives and the river is closed under regulations. The famous browns and rainbows are in deep winter lies. A planning month for the coming season — book guide trips, tie hoppers and caddis patterns.
Productive Patterns
- Planning season — Bow River closed in December
- Tie Hopper, Caddis, and PMD patterns
- Book guide trips for July–August peak season
Tips
December is winter planning season for Bow River fishing. The river is closed. Tie Dave's Hoppers and Parachute patterns for next July's hopper fishing. Book guide trips in Calgary — the best guides fill up for July and August by February. Season reopens April 1.
Water Notes
Water 32-36°F. Alberta winter. Closed season. Ice forming on river. Season reopens April 1 on most sections.
Hatch Calendar
| Insect | Peak | Active | Size | Productive Patterns |
|---|---|---|---|---|
| Blue Winged Olive Baetis spp. |
May, Sep, Oct | Apr, May, Sep, Oct, Nov | #18–22 |
|
| Pale Morning Dun Ephemerella infrequens |
Jul | Jun, Jul, Aug | #16–18 |
|
| Caddis Hydropsyche spp. |
Jun, Jul | May, Jun, Jul, Aug, Sep | #14–18 |
|
Access & Approach
Calgary, AB. Numerous public access sites throughout the city reach and below. Alberta Sport Fishing licence required. Waders required year-round — the Bow is cold. Bow River Trout Shop and local outfitters in Calgary are well-resourced.
Nearby Fly Shops
- Bow River Fly Fishing Co
- Dave Brown Outfitters
Regulations & License
Fishing in Alberta requires a current license. Always verify season dates, bag limits, and any special-regulation waters before you fish.
Alberta fishing regulations & license →
Nearby Waters
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About Current
Bow River conditions on Current combine real-time flow data (USGS, WSC, CDEC, CEHQ), weather, tide predictions, hatch probabilities calibrated to this specific water, and recent fly shop reports from the area.
Bow River is one of 245 hand-curated waters in Current. The app and web forecast also generate AI outlooks for any unlisted river, lake, or saltwater flat anywhere in the world — drop a pin or paste a name and Current produces a fresh seasonal outlook with weather, flow context, and recommended techniques.
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