Lac Ste. Thérèse

Lake Northern Ontario FMZ 3 Crown Land (Free)

About this spot

Lac Ste. Thérèse is a lake in the Northern Ontario area of Ontario, in Fisheries Management Zone 3. An MNR depth chart exists for this lake (surveyed 1961). This waterbody sits on Ontario Crown land open to anglers holding a valid Ontario fishing licence.

Location

Fish Species

No species reported for this spot yet.

Lake data from Ontario government surveys

Depth chart

MNR depth chart on file, surveyed 1961

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 3

Lac Ste. Thérèse is in Fisheries Management Zone 3. 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 3 rules before you fish.

FMZ 3 regulations on ontario.ca

Ice fishing on Lac Ste. Thérèse (2026–27)

Ontario has no separate ice fishing season: the regular open seasons apply through the ice. Lac Ste. Thérèse is in Fisheries Management Zone 3, where 8 of 10 species groups are open for the whole ice season (December 1 to March 31) under the zone-wide rules.

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

Lac Ste. Thérèse is not listed by name in the zone's species or waterbody exceptions or fish sanctuaries. Some exceptions cover whole townships or river systems, so read the zone page before you go.

Ice huts in Zone 3

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 3 ice fishing rules Ice fishing in Ontario guide

Source: Ontario Fishing Regulations Summary 2026, Zone 3 (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.