Freestone · Limestone · Ontario

Beaver River

Beaver River venue image
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The Beaver at Thornbury is a famous, accessible Georgian Bay steelhead river — the dam and fishway draw crowds in spring as lake-run rainbows stack up.

Species

About as good as it gets

Low and clear — careful approach country. Take your time — read the water before you cast.

The water should be around 16°C, about where the trout want it, sitting at a steady height, running clear.

90% confidence in this read
Water temperature for brown trout
Ideal
16°C est.ideal 10–16°C
0°14°28°
The full read · show the working · for brown trout · confidence 90%
How the 87 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 87
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Conditions
○Regional est.
Level
Dry recently
No gauge reading
Water temp
15.5°C
Estimated
Clarity
Clear
Air temp
18°C
Wind
W 17 km/h
Gentle breeze
Pressure
1010 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
6.9 mm
Light rain · next 48h

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Hatch timeline · todayPeak at 9pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.

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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 — conditions well-balanced, with water temperature particularly in your favour.
Through the year
0–3 scale · June 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
Quill GordonHatch
2
2
Blue QuillHatch
2
3
2
HendricksonHatch
2
2
Eastern March BrownHatch
2
2

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

Gallery · 1
  1. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Dam/fishway and sanctuary rules; FMZ 16 seasons
  • Verify current OFRS.
Directions
Apple MapsGoogle Maps
About this water

The Beaver at Thornbury is a famous, accessible Georgian Bay steelhead river — the dam and fishway draw crowds in spring as lake-run rainbows stack up. Smaller than the Saugeen or Nottawasaga, it concentrates fish in its lower reaches and is a reliable, if popular, spring-and-fall steelhead venue with autumn chinook.

Under the surface

The Beaver enters Georgian Bay at Thornbury, where the dam and fishway are a famous spring steelhead spectacle. A smaller, accessible river below the Niagara Escarpment, it runs strong spring and fall lake-run rainbows with chinook in autumn, and concentrates fish in its lower reaches and dam pool.

Wading: Strong spring flows, crowds at the dam

  • Limestone
  • Partly confined
  • Pool riffle
  • Medium river
Seasons & zones
  • Trout1 January → 31 December
Other water nearby · 3
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