Mattagami River

River Northern Ontario FMZ 8 Provincial Park

About this spot

Mattagami River is a river in the Northern Ontario area of Ontario, in Fisheries Management Zone 8. MNR fish surveys (1998–2007) recorded 10 species here, including white sucker, walleye and northern pike. An MNR depth chart exists for this lake. This waterbody is inside an Ontario provincial park: a valid Ontario fishing licence is required and park rules apply.

Location

Fish Species

Sucker Walleye Northern Pike Smallmouth Bass Lake Whitefish Yellow Perch Burbot Rock Bass Cisco

No species reported for this spot yet.

Lake data from Ontario government surveys

Ontario's Ministry of Natural Resources holds 50 fish survey records from 1998 to 2007. Survey methods: Gillnet, Angling.

Species recorded (10)

White Sucker · 45 Walleye · 37 Northern Pike · 30 Longnose Sucker · 26 Smallmouth Bass · 15 Lake Whitefish · 4 Yellow Perch · 3 Burbot · 1 Rock Bass · 1 Cisco · 1

Number of survey records that list the species.

Depth chart

MNR depth chart on file

Sources: Land Information Ontario — Aquatic Resource Area survey points, Bathymetry Index and Bathymetry Line, Fisheries Management Zones, Fishing Access Points. Contains information licensed under the Open Government Licence – Ontario.

Fisheries Management Zone 8

Mattagami River is in Fisheries Management Zone 8. Open seasons, catch limits and size limits in Ontario are set zone by zone, and some lakes carry their own exceptions, so check the FMZ 8 rules before you fish.

FMZ 8 regulations on ontario.ca

Ice fishing on Mattagami River (2026–27)

Ontario has no separate ice fishing season: the regular open seasons apply through the ice. Mattagami River is in Fisheries Management Zone 8, where 9 of 11 species groups are open for the whole ice season (December 1 to March 31) under the zone-wide rules. Of the game fish government surveys recorded in this lake, lake whitefish, smallmouth bass, northern pike, walleye and yellow perch are open at least part of the winter under the zone-wide rules.

Fish sanctuary. The summary lists Mattagami River as a fish sanctuary: No fishing - April 1 to June 15. No fishing is allowed during that period, whatever the table below says.

Species	Through the ice	Zone-wide season	Limits
Lake whitefish recorded here	Open	open all year	S-25 and C-12
Largemouth and smallmouth bass combined recorded here	Open	open all year	S-6 and C-2
Northern pike recorded here	Open	open all year	S-6; not more than 2 greater than 61 centimetres, of which not more than 1 greater than 86 centimetres, and C-2; not more than 1 greater than 61 centimetres, none greater than 86 centimetres
Walleye and sauger combined recorded here	Open	January 1 to April 14 and third Saturday in May to December 31	S-4 and C-2; not more than 1 greater than 46 centimetres
Yellow perch recorded here	Open	open all year	S-50 and C-25
Brook trout	Part of the season Jan 1 – Mar 31	January 1 to September 15	S-5 and C-2
Lake sturgeon	Open	January 1 to April 30 and July 1 to December 31	S-0 and C-0
Lake trout	Part of the season Feb 15 – Mar 15	February 15 to March 15 and third Saturday in May to September 30	S-3 and C-1
Rainbow trout	Open	open all year	S-5 and C-2
Splake	Open	open all year	S-5 and C-2
Sunfish	Open	open all year	S-50 and C-25

S = sport fishing licence, C = conservation licence (daily catch and possession). Dates are worked out for 2026–27 from the wording of the 2026 summary. Ontario publishes a new summary every January 1, so check the 2027 edition for dates after December 31.

Rules specific to Mattagami River

The 2026 summary lists this lake by name. These rules replace the zone-wide ones above where they overlap.

Fish sanctuary (Mahaffy Township, lying between the Lower Sturgeon hydro dam and downstream to the northern boundary of Mahaffy Township): No fishing - April 1 to June 15
Fish sanctuary (Mountjoy Township, from the face of Sandy Falls power dam downstream to the boundary of Mountjoy Township): No fishing - April 1 to June 15

Ice huts in Zone 8

No hut registration is required in this zone. There is no fixed removal date, but every hut must be off before the ice breaks up. You may fish with two lines through the ice in most waters, within 60 m and in sight of each.

Zone 8 ice fishing rules Ice fishing in Ontario guide

Source: Ontario Fishing Regulations Summary 2026, Zone 8 (ontario.ca); ice hut rules: ontario.ca/page/ice-fishing. This summary is not the law: check the regulations and local conditions, and never go on ice you have not tested.