Freestone · Volcanic · Ontario, CA

Nipigon River

Nipigon River — Nipigon River

The Nipigon is the most storied brook-trout river on the planet — Lake Superior's biggest tributary, draining Lake Nipigon through huge diabase-canyon water, and home of the longest-standing world record in sport fishing (a 14.

Prime · Pike
Large streamer / sculpin · 8–10
Primelive now
About as good as it gets
River dropping into shape after a lift. The kind of afternoon you remember — a weighted nymph through the clearing seams, the dry as it settles.
75% confidence
What moved it
  • Level26.73 mDropping after lift
  • Water temp12.5°C
  • ClarityClear
Today's fly
LS
Large streamer / sculpin8–10
Strip it for fish chasing fry or in coloured water.
Conditions on the water
Live gauge
Level
Steady
26.73 m
Dropping after lift
Water temp12.5°C
ClarityClear
Weather14°C
WindS 14 km/h
Pressure1012 hPa
Rain · recent0.1 mm
Rain · ahead31.9 mm

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

Water temperature for Pike
Ideal
13°C est.ideal 8–18°C
0°14°28°
How to fish it · for Pike
When
Brook trout summer (canyon pools) into early autumn; steelhead spring and fall.
Where
The Nipigon is the most storied brook-trout river on the planet — Lake Superior's biggest tributary, draining Lake Nipigon through huge diabase-canyon water,…
Why this works
Excellent — water temperature is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
Caddisflies
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 11 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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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
1
Brown DunHatch
2
3
3
3
3
3
3
2
Quill GordonHatch
2
2
Blue QuillHatch
2
3
2
HendricksonHatch
2
2

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

Ranked for today
Pike fly box
LS
Large streamer / sculpinTop
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
BS
Big stonefly nymph
14–16 · Nymph
Search the runs and pockets, dead-drift near the bottom.
Permits & access
Permit required — see local rules.
  • FMZ 9: 22-inch brook-trout minimum, one-fish limit
  • Verify the current OFRS.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Lake Nipigon
48 km
Brook trout · Lake trout · Pike
Gallery · 2
  1. Nipigon River — Nipigon River
    Nipigon River
  2. Terrain map of the venue
    Terrain map
About this water

The Nipigon is the most storied brook-trout river on the planet — Lake Superior's biggest tributary, draining Lake Nipigon through huge diabase-canyon water, and home of the longest-standing world record in sport fishing (a 14.5-lb brookie, 1915). It still grows brook trout past 20 inches, with lake trout, steelhead and salmon in the system. Big water, a 7–8 weight, and a 22-inch minimum that tells you everything about the size of fish here.

Under the surface

Lake Superior's largest tributary, draining Lake Nipigon through big, powerful diabase-canyon water — the most famous brook-trout river on earth, holding the long-standing world-record brook trout and still growing brookies of 20 inches and more, with lake trout, steelhead, salmon and pike in the system.

Wading: Big powerful regulated river, slick rock — boat/guide and careful wading

  • Volcanic
  • Confined
  • Pool riffle
  • Large river
Conservation note

Wild native brook trout — the world-record river (22-inch minimum, one-fish limit): a treasured trophy fishery, fish it catch-and-release-minded and respect the size rule. Lake trout, steelhead, Chinook and pike also present (separately regulated). Clean-Drain-Dry.

The full read · show the working · for Pike · confidence 75%
How the 82 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow90 × 22%19.8
Clarity85 × 18%15.3
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity65 × 12%7.8
Conditions total= 82
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 → 30 September
  • Coarse 1 January → 31 December

    Ontario's current Fishing Regulations Summary lists the Nipigon River and Lake Nipigon under FMZ 6, where pike is open all year. This pack's existing brook_trout entry is tagged FMZ 9 — flagging that zone-assignment discrepancy for follow-up rather than silently resolving it; verify both zone tags against the current Ontario Fishing Regulations Summary.

Related guides
Euro Nymphingsubsurface methods
Booking & contacts