Tailwater · Limestone · Ontario, CA

Grand River (tailwater, below Shand Dam)

Belwood Lake Conservation Area- Grand River-View from Shand Dam-Ontario-20180804
Today · Slow going — pick your moments
Czech Nymph
Forecast · Today
Slow going — pick your moments
Slow going — pick your moments and do not force it.
45% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Today
Estimate
Level
Dry recently
No gauge reading
Water temp11.5°C
ClarityVery coloured
Weather15°C
WindN 9 km/h
Pressure1017 hPa
Rain · recent1.9 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Ideal
12°C est.ideal 10–16°C
0°14°28°
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 insect activity could be better.
Likely species
Mayflies
Caddisflies
Hatch timeline · todayPeak at 12h

12h(now) — Eastern Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 52%
Also:Black Midge26%
Peak emergence windowWeather boost5 food groups active

Peak activity at 12h — Eastern Blue-Winged Olive (Eastern Blue-Winged Olive, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Evidence
Records-basedModerate confidence

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

Through the year
0–3 scale · September 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
SulphurHatch
2
3
2
Trico (Eastern)Hatch
2
3
3
2
Eastern Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Eastern Summer BWO (Drunella)Hatch
2
3
3
2

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

Ranked for today
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
  • Fly/artificial special-regulation reach; FMZ 16 seasons elsewhere
  • Verify current OFRS.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Credit River
59 km
30
Steelhead · Brown trout · Chinook salmon
Gallery · 2
  1. Belwood Lake Conservation Area- Grand River-View from Shand Dam-Ontario-20180804
  2. Terrain map of the venue
    Terrain map
Conservation note

Wild and stocked brown trout in a cool tailwater; a fly/artificial special-regulation reach. Lower river holds lake-run steelhead and salmon from Lake Erie via the Grand. Mind summer water temperatures below the cool reach. Clean-Drain-Dry.

The full read · show the working · for Brown Trout · confidence 90%
How the 86 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 activity60 × 12%7.2
Conditions total= 86
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Euro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts