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Sulphurous Lake

MU 5-1, Cariboo
51.6300° N, 120.8317° W

Map of Sulphurous Lake: the shoreline from the BC Freshwater Atlas, the roads round it from the BC Digital Road Atlas, the traced road in and the recreation site.120°55′W120°54′W120°53′W120°52′W120°51′W120°50′W120°49′W120°48′W51°37′N51°37.5′N51°38′N51°38.5′N51°39′NSulphurous LakeSulphurous Lake rec site15 m to shore01 kmNMap of Sulphurous Lake: the shoreline from the BC Freshwater Atlas, the roads round it from the BC Digital Road Atlas, the traced road in and the recreation site.120°52′W120°50′W120°48′W51°36′N51°37′N51°38′N51°39′NSulphurous Lake rec site15 m to shore02 kmN
WaterTraced road inRoadRough surface roadRec siteShoreline from the BC Freshwater Atlas, roads from the BC Digital Road Atlas, under the Open Government Licence, British Columbia. Rec site position from BC Recreation Sites and Trails, checked 11 September 2026. The lake's depth is not drawn on this map.
Surface area
384.7ha
Maximum depth
46.9m
154 ft
Elevation
1,130m

Clean, highly productive Interlakes lake known for solid 2 to 5 lb Blackwater rainbows.

Open Sulphurous Lake in the appThe 7-day forecast, max depth and wildfire smoke check, on the lake's own coordinate.

Trophy fish at Sulphurous Lake

Sulphurous Lake is known for trophy Lake trout to 12 lb.

  • Rainbow trout to 6 lb
  • Lake trout to 12 lb

Trophy sizes this lake is known for, not a typical catch. They are historical records from our own big fish list, with no date on file, not recent catches.

Sulphurous Lake at a glance

Region
Cariboo
Management unit
MU 5-1
Species
Rainbow Trout, Lake Trout, Kokanee, Northern Pikeminnow (last recorded 1970), Redside Shiner (last recorded 1970), Sucker (General) (last recorded 1970)The newest of these fish records is from 2026.Species from the province's fish observation records.
Lake size
Medium Lake (50 - 500 ha)
Ice fishing
Open to ice fishing, confirmed
Coordinates
51.63, -120.8317

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Fish on record at Sulphurous Lake

Species in the Province's fish observation records
SpeciesFirst recordedLast recordedRecords
Rainbow Trout19532026120
Lake Trout1970200186
Kokanee1996202673
Northern Pikeminnow197019702
Redside Shiner197019702
Sucker (General)197019702

A year is when the Province last recorded the fish here, not a statement that it is caught today.

How to fish Sulphurous Lake

Chironomid fishing over spring shoals, trolling spoons (Kroc, Dick Nite), leech patterns on sinking line.

Best times of year at Sulphurous Lake

  • May - June
  • September - October

Sulphurous Lake fishing regulations

Lake trout daily quota = 1, none over 50 cm; lake trout catch and release Oct 1-Nov 30. Source: Province of British Columbia

Getting to Sulphurous Lake

Sulphurous Lake Road off Hwy 24. Public boat launch and recreation areas.

6.3 km of traced road to the campground by way of PettyJohn Rd and Mahood Lake Rd. The road at the end is a loose surface.

The road route traced to Campground at Sulphurous Lake, 6.3 km.Start of the traceCampground2 km
The route traced over the BC Digital Road Atlas. A trace is a line on a map, not a report on the road: check conditions before you drive it.

Coordinates: 51.63, -120.8317

Camping and rec sites at Sulphurous Lake

  • Deka/sulphurous Portage
    No campsite count on file (BC Recreation Sites and Trails)
    Access: Forestry Service Road (100 Mile House Natural Resource District)
  • Sulphurous Lake
    To the shore
    15 m

    No campsite count on file (BC Recreation Sites and Trails)
    Coordinates: 51.640205, -120.818897

Depth chart for Sulphurous Lake

46.9 mdeepest

Sulphurous Lake runs to 46.9 m (154 ft) at its deepest.

The Province sounded Sulphurous Lake and published the depth chart surveyed in 1972.

The ice year at Sulphurous Lake, modelled

Modelled from air temperature, not an ice report. It says nothing about whether ice will hold you.

In the model Sulphurous Lake froze in 65 of the 65 winters since 1960. Freeze-up falls most years between 1 November and 14 November, and ice-off between 1 May and 19 May. The median winter freezes on 7 November and opens on 12 May.

Modelled ice season at Sulphurous Lake: freeze-up most winters between 1 November and 14 November, ice-off between 1 May and 19 May.OctNovDecJanFebMarAprMayJunFreeze-upIce-offabout 184 days in the median winter

the middle half of modelled winters the median ice cover in the median winter

Winter 2024-25 in the model: frozen from 15 November 2024 to 13 April 2025, 149 days.

Sulphurous Lake is open to ice fishing under the regulations on file.

Whether a lake is open to ice fishing says nothing about whether its ice will hold you. Ice conditions vary year to year and across a single lake. Check locally before going out, every time.

Sulphurous Lake climate, 1960 to 2025

Averaged over a year, the air above Sulphurous Lake is 1.1 C warmer than it was in the 1960s. That is 66 years of daily readings, not a forecast.

  • +1.1 Csince the 1960s
  • 2.3 Caverage year now
  • 1.2 Caverage year then
  • -11 daysbelow freezing, change
Average year at Sulphurous Lakedegrees C, yearly mean
-1 C2 C5 C1960198020002020

each yearthe trend across 1960 to 2025

Days below freezingdays a year averaging under 0 C
1151582001960198020002020

each yearthe trend across 1960 to 2025

This week at Sulphurous Lake

The forecast on this lake's own coordinate, refreshed through the day. The app reads these seven days for fishing and scores each one.

DaySkyHigh / lowWindRainPressure
Tue 20 OctMainly clear11° / -1°13 km/h, gusts 25drySteady
Wed 21 OctOvercast13° / 2°13 km/h, gusts 27dryFalling (-9.7 hPa)
Thu 22 OctLight drizzle7° / 0°19 km/h, gusts 41dryRising (+2.5 hPa)
Fri 23 OctOvercast5° / -3°13 km/h, gusts 24dryRising (+13.6 hPa)
Sat 24 OctOvercast5° / 0°8 km/h, gusts 15dryFalling (-2.1 hPa)
Sun 25 OctMainly clear6° / -3°9 km/h, gusts 21dryRising (+5.4 hPa)
Mon 26 OctOvercast8° / -1°9 km/h, gusts 18dryFalling (-2.3 hPa)

Open Sulphurous Lake in the app

Sulphurous Lake, in brief

What fish are in Sulphurous Lake?

Rainbow Trout, Lake Trout, Kokanee. Species from the province's fish observation records.

Which management unit is Sulphurous Lake in?

Sulphurous Lake is in MU 5-1, in the Cariboo. The BC Freshwater Fishing Regulations Synopsis is organised by management unit; check it before you go.

Trout lakes near Sulphurous Lake

All 328 lakes in the Cariboo, with today's conditions on each.

Reading the water