MATTAWISHKWIA RIVER AT HEARST

MATTAWISHKWIA RIVER ON WSC

MATTAWISHKWIA RIVER AT HEARST (04LK001) is a real-time river monitoring station on the MATTAWISHKWIA RIVER in ON, operated by the Water Survey of Canada. Riverbot tracks its river conditions, including water level, and streamflow and keeps recent, datum-labelled water-level history for anglers. 5 fish species are associated with this station in public fish records.

WSC station ID: 04LK001
Operated by: Water Survey of Canada
Province: ON
Coordinates: 49.6828, -83.6568

Live conditions & history

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Fishing regulations

FMZ 8 zone default

Default area rules for fish in the public records above. A grey row means the release has no canonical regulation match for that species.

FMZ 8 zone default only. Water-specific, national-park, sanctuary, licence, and in-season exceptions may apply.

Brook trout Open · Harvest allowed within limits Jan 1 – Sep 15 Details Close
- Jan 1 – Sep 15
  
  Sport licence catch-and-possession limit
  5
  
  Conservation licence catch-and-possession limit
  2
  
  Official rule · retrieved Jul 25, 2026
Lake sturgeon Open · Harvest status unknown Jul 1 – Dec 31; Jan 1 – Apr 30 Details Close
- Jul 1 – Dec 31
  
  Official rule · retrieved Jul 25, 2026
Lake trout Open · Harvest allowed within limits Feb 15 – Mar 15; May 16 – Sep 30 Details Close
- May 16 – Sep 30
  
  Sport licence catch-and-possession limit
  3
  
  Conservation licence catch-and-possession limit
  1
  
  Official rule · retrieved Jul 25, 2026
Lake whitefish Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  25
  
  Conservation licence catch-and-possession limit
  12
  
  Official rule · retrieved Jul 25, 2026
Largemouth and smallmouth bass combined Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  6
  
  Conservation licence catch-and-possession limit
  2
  
  Official rule · retrieved Jul 25, 2026
Northern pike Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  6
  
  Conservation licence catch-and-possession limit
  2
  
  Size rule
  not more than 2 greater than 61 centimetres of which not more than 1 greater than 86 centimetres ; not more than 1 greater than 61 centimetres none greater than 86 centimetres
  
  Official rule · retrieved Jul 25, 2026
Rainbow trout Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  5
  
  Conservation licence catch-and-possession limit
  2
  
  Official rule · retrieved Jul 25, 2026
Splake Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  5
  
  Conservation licence catch-and-possession limit
  2
  
  Official rule · retrieved Jul 25, 2026
Sunfish Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  50
  
  Conservation licence catch-and-possession limit
  25
  
  Official rule · retrieved Jul 25, 2026
Walleye and sauger combined Open · Harvest allowed within limits Jan 1 – Apr 14; May 16 – Dec 31 Details Close
- May 16 – Dec 31
  
  Sport licence catch-and-possession limit
  4
  
  Conservation licence catch-and-possession limit
  2
  
  Size rule
  not more than 1 greater than 46 centimetres
  
  Official rule · retrieved Jul 25, 2026
Yellow perch Open · Harvest allowed within limits Open all year Details Close
- Open all year
  
  Sport licence catch-and-possession limit
  50
  
  Conservation licence catch-and-possession limit
  25
  
  Official rule · retrieved Jul 25, 2026

General area restrictions

Period not confirmed

Sport licence catch-and-possession limit
5

Conservation licence catch-and-possession limit
2

Limit details
total daily catch possession limit for all trout salmon species combined

Official rule

Effective Jan 1, 2026 – Sep 14, 2027 · evaluated for 2026-09-10 in America/Toronto

Regulations shown are for reference only and may not reflect in-season changes. Always verify current regulations with the Ontario Fishing Regulations Summary before fishing.

Fish recorded near this station

Community observations nearby

Mattawishkwia River At Hearst has 5 fish species documented via iNaturalist research-grade observations within 10 km. These community-sourced records indicate fish presence in the vicinity.

Species include: White Sucker (Catostomus commersonii), Finescale Dace (Chrosomus neogaeus), Iowa Darter (Etheostoma exile), Common Logperch (Percina caprodes), Longnose Dace (Rhinichthys cataractae).

White Sucker Catostomus commersonii
Finescale Dace Chrosomus neogaeus
Iowa Darter Etheostoma exile
Common Logperch Percina caprodes
Longnose Dace Rhinichthys cataractae

Where these records come from

Evidence: Community observations nearby; Research-grade community observations (iNaturalist) recorded near this station, not a formal survey.
Records: 5 species; from 5 individual records
Observed: Aug 24, 2019 – Aug 3, 2021; 5 dated records

Sources

iNaturalist research-grade fish observations — 5 records