Algoma District, Ontario
Ranger Lake
Twenty-three square kilometers of cold water northeast of Sault Ste. Marie, with 27 islands and 76 kilometers of shoreline, charted to 73.2 meters. Twenty lake trout spawning areas are mapped, and the aquatic resource record lists 25 species.
- Surface
- 23.3 km²
- Shoreline
- 76 km65 mainland + 11 islands
- Islands
- 27
- Charted depth
- 73.2 m
- Depth contours
- 79
All figures are derived from Ontario’s survey records.
Where Ranger Lake is
Ranger Lake lies in the District of Algoma.
How deep is Ranger Lake?
The deepest mapped contour on Ranger Lake is 73.2 meters, and the water within that boundary descends even farther. Ontario’s bathymetry record holds 79 depth contours for Ranger Lake.
Surveyed Depths
Ontario has surveyed the depths of several thousand of its lakes over more than half a century. Later surveys were conducted by boat with satellite positioning and produced hundreds of thousands of soundings per lake. Earlier surveys were charted by running transects across the water and drawing depth contours by hand.
Water quality
Ontario’s Lake Partner Program is a volunteer monitoring network. Participants collect a water sample each spring for phosphorus analysis and measure water clarity through the summer with a Secchi disk.
Phosphorus is the nutrient that controls how much algae a lake can grow. A lake with little phosphorus stays clear and supports cold-water fish such as lake trout. As phosphorus rises, algae increase, the water clouds, and oxygen in the deep water falls as the algae decay. The province classifies each monitoring site by its spring phosphorus. Below 10 micrograms per litre is oligotrophic: clear water and low algae. From 10 to 20 is mesotrophic: moderately productive water, with more algae and weed growth than an oligotrophic lake but rarely a bloom. Above 20 is eutrophic: nutrient-rich water, prone to algal blooms and low oxygen at depth.
A Secchi disk is a 20 centimeter white or black-and-white plate lowered on a marked line until it disappears from view. The depth at which it vanishes is the Secchi depth, a direct measure of water clarity. Clearer water gives a deeper reading.
Ranger Lake has 1 Lake Partner monitoring site, which has yet reported phosphorus for the three years the province requires before a status is assigned.
Fish in Ranger Lake
Ontario’s aquatic resource records name 24 fish species in Ranger Lake. The province classes the lake as cold water. The record took effect on 5 September 2017, and it compiles what field biologists had reported by then.
Seven of the 24 species in the province’s records
Lake Trouttrout and whitefish
Brook Trouttrout and whitefish
Lake Whitefishtrout and whitefish
Round Whitefishtrout and whitefish
Northern Pikepike
Pumpkinseedsunfish
Bluegillsunfish
| Family | Species |
|---|---|
| Sucker | longnose sucker, shorthead redhorse, white sucker |
| Minnow | blacknose dace, blacknose shiner, bluntnose minnow, common shiner, creek chub, emerald shiner, fathead minnow, finescale dace, lake chub, northern redbelly dace, spottail shiner |
| Sculpin | slimy sculpin, spoonhead sculpin |
| Stickleback | brook stickleback |
Spawning areas
Ontario maps 20 fish spawning records within the Ranger Lake outline: 20 lake trout spawning areas covering 1.83 hectares. Every record is recorded as verified and presently suitable, and none is classed as sensitive.
By number of records
By area mapped
- Lake Trout20 areas1.8 ha
The federal Fisheries Act prohibits the harmful alteration, disruption or destruction of fish habitat without an authorization, so a dock, dredging, infill or shoreline work at a mapped spawning area is reviewed on that basis.
Stocking history
Ontario’s stocking records for Ranger Lake run from 1946 to 1993 and hold 35 releases. Lake Trout account for most of the fish: 215,200 released in sixteen of the years between 1946 and 1984. The last recorded release was 3,474 brook trout yearlings in 1993.
| Species | Years | Years with a release | Fish released |
|---|---|---|---|
| Lake Trout | 1946 to 1984 | 16 | 215,200 |
| Brook Trout | 1946 to 1993 | 14 | 187,664 |
The province’s current stocking programme, recorded from 2016, lists no release into Ranger Lake.
Eating the fish
The 2025 Guide to Eating Ontario Fish carries consumption advice for two species taken from Ranger Lake, tested for contaminants at a sampling location in Reilly Twp., Algoma Dist. Each figure below is the most meals a month the guide advises for a fish of that length. The advice falls as the fish gets longer, because mercury accumulates over a fish’s life. A zero means the guide advises no meals of that fish at that size.
General population adultsSensitive population children under fifteen, women who are or may become pregnant
| Length, cm | 25 to 30 | 30 to 35 | 35 to 40 | 40 to 45 | 45 to 50 | 50 to 55 | 55 to 60 | 60 to 65 | 65 to 70 |
|---|---|---|---|---|---|---|---|---|---|
| General population | 12 | 12 | 12 | 12 | 12 | 8 | 8 | 8 | 8 |
| Sensitive population | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Length, cm | 35 to 40 |
|---|---|
| General population | 16 |
| Sensitive population | 8 |
Fisheries Management Zone 10
Ranger Lake lies in Fisheries Management Zone 10. Ontario sets its fishing seasons and catch limits by zone.
| Species | Open season | Sport licence | Conservation licence |
|---|---|---|---|
| Atlantic Salmon | Jan. 1 – Sept. 30 | 1 | 0 |
| Brook Trout | Jan. 1 – Sept. 30 | 5 | 2 |
| Brown Trout | Open all year | 5 | 2 |
| Channel Catfish | Open all year | 12 | 6 |
| Crappie | Open all year | 30 | 10 |
| Lake Trout | Jan. 1 – Labour Day | 2, not more than 1 greater than 40 cm (15.7 in.) | 1 |
| Lake Whitefish | Open all year | 12 | 6 |
| Largemouth and Smallmouth Bass or any combination | 3rd Saturday in June – November 30 | 6 | 3 |
| Muskellunge | 3rd Sat. in June – Dec. 15 | 1, must be greater than 122 cm (48 in.) | 0 |
| Northern Pike | Open all year | 6; not more than 1 greater than 61 cm, none greater than 86 cm | 2; none greater than 61 cm |
| Pacific Salmon | Open all year | 5 | 2 |
| Rainbow Trout | Open all year | 2 | 1 |
| Splake | Open all year | 5 | 2 |
| Sunfish | Open all year | 50 | 25 |
| Walleye and Sauger or any combination | January 1 to the third Sunday in March and third Saturday in May to December 31 | 4, none greater than 46 cm | 2, none greater than 46 cm |
| Yellow Perch | Open all year | 50 | 25 |
The figures are the number of fish an angler may catch and keep in a day and have in possession, under a sport fishing licence and under a conservation licence. The rows are the whole zone’s, and they apply to every lake in it.
| Species | Open season | Sport licence | Conservation licence |
|---|---|---|---|
| Largemouth and Smallmouth Bass or any combination | Open all year | Zone-wide | Zone-wide |
Where a row reads zone-wide, the zone’s own season or limit above applies.
Ranger Lake Ice Fishing
An ice hut on Ranger Lake must be removed by March 31. Ranger Lake lies in fisheries management zone 10, one of the twenty zones Ontario sets its fishing rules by, and one removal date applies across the whole zone.
An ice hut must also be removed before the ice breaks up, whether or not that date has passed. The deadline clears huts from the ice ahead of the thaw and does not close the fishing season.
Registration is required in zone 10 for an ice hut built of anything other than fabric, and for a fabric tent covering seven square meters or more. Registration is free, and the number is displayed on the outside of the hut.
Ice conditions
No public record reports the thickness or the condition of the ice on Ranger Lake on any given day. Ontario publishes ice safety guidance for anyone going out on the ice, at ontario.ca.
Islands and names
Ranger Lake contains 27 islands in the Ontario Hydro Network’s outline, one of them over 10 hectares and fourteen under a tenth of a hectare.
| Island | Hectares | |
|---|---|---|
| 1 | Big Island | 13.7 |
| 2 | Moss Island | 6.3 |
| 3 | Savage Island | 4.7 |
| 4 | Mattress Island | 4.4 |
| 5 | Lewis Island | 3.5 |
| 6 | Mary Baily Island | 1.3 |
| 7 | unnamed | 1.1 |
| 8 | Crane Island | 1.0 |
| 9 | unnamed | 0.6 |
| 10 | unnamed | 0.2 |
Official names
Ontario’s geographic names register lists 13 official names on the water and its islands: 9 islands and three bays.
Bays 3
- Camp Ten Bay
- Indian Bay
- Vielles Bay
Nearby lakes
- Basswood Lake66 km away
- Chiblow Lake73 km away
- Matinenda Lake75 km away
- Lauzon Lake97 km away
Questions about Ranger Lake
- How deep is Ranger Lake?
Its deepest charted contour is 73.2 meters, and the water within it is deeper.
- How big is Ranger Lake?
Its surface covers 23.3 square kilometers and it holds 27 islands. Of its 76 kilometers of shoreline, 65 kilometers is the mainland shore and 11 kilometers is the shore of the islands.
- What fish are in Ranger Lake?
Ontario’s aquatic resource records name 24 species, among them lake trout, northern pike, lake whitefish and brook trout.
A print of Ranger Lake
Ranger Lake has not yet been drawn as a print. The lakes drawn so far are on the lake maps page, and a print of Ranger Lake can be requested by email; whether it can be drawn is confirmed before any payment.
Ask about a Ranger Lake printLooking at a property on Ranger Lake?
Depth and water quality are two records out of many. Our Rural & Cottage Buyer’s Report gathers what the public record holds about one specific address: shore road allowance, road access, wells, flood mapping, Crown land, wetlands and more, read and checked by a person before it is sent.
What these figures do and do not say
- Depth
- A depth reading is the distance from the water surface on the day of survey to the lake bottom. Lake levels vary through the season and between years. The depth figure above is the deepest contour charted and is a minimum; the depth within it was not recorded. The figures for Ranger Lake are read from the province’s bathymetry records within the Ontario Hydro Network’s outline of the lake: the deepest figure is the deepest record inside that outline, and the count is every record inside it.
- Shoreline and surface
- The shoreline figure is the length of the mainland shore and of every island shore added together, measured on the Ontario Hydro Network’s outline of the lake. The surface figure is the area of water inside that outline, less the area of its islands. The provincial outline is mapped to within a few meters of the shore, and a shoreline measured from a coarser map comes out shorter, which is why a figure published elsewhere is often lower.
- Survey coverage
- Not every survey covered every arm of a lake, and the province’s index does not always record where a survey ended.
- Water quality
- Each figure belongs to a single monitoring site and not to the lake as a whole. A bay receiving a creek can read differently from open water half a kilometer away. Sites are matched to Ranger Lake by name in the province’s records.
- Nearby lakes
- Distances are measured between lake centres.
- Islands and names
- Islands are counted and measured on the Ontario Hydro Network outline; names are the register’s, placed by its own coordinate. The register names islands the outline draws as part of a larger one, and the outline holds islands the register has not named, so the two counts differ. The outline carries some lakes across marsh, so a gap in the marsh is drawn as land, and every such gap is included in the island count. Where the register has not named one and it lies mostly inside a wetland in the province’s Wetland With Significance dataset, the page names the wetland and the table of largest islands leaves it out. Wetland boundaries are mapped at their own scale and can cover a small island whole.
- Depth contours
- Each contour is drawn where the survey placed it, at the survey’s own positional accuracy. The survey carries its own shoreline, which differs from the Ontario Hydro Network’s outline, so a contour near the shore can run to or past the outline. Such a stretch is drawn along the outline, as a drawing convention, and is not the survey’s line there. The contour count in the stat band is the province’s, and it includes the survey’s own shoreline contour, one ring around the mainland and one around each charted island, which the map leaves off; the map’s small print gives the split.
- Location
- Municipal boundaries are read from the province’s records as published and can lag a boundary change.
- Fish
- Ontario’s fish records are compilations of existing knowledge from field biologists and do not represent exhaustive inventories. A species that is not listed was not ruled out. The species list carries one date for the whole record and none for any species.
- Spawning areas
- A spawning area is drawn where the province mapped it, at the province’s stated accuracy, and the record says nothing about how many fish use it in a given year. A nest record is one nest seen on one day; a count of nests is not a count of fish, and a count of records is not a comparison between species. Whether a given piece of work needs an authorization is a determination made by Fisheries and Oceans Canada on the work itself.
- Stocking
- A stocking record is a release on a date. It says nothing about how many fish survived or about the population in the lake today.
- Eating advice
- The guide’s advice is for fish taken from the lake at the tested location and applies to the size classes tested. The province’s guide is the authority and is updated each year.
- Fishing rules
- Seasons and limits are the zone’s, for the year of the dataset the page was built from, and a licence’s own conditions and any waterbody exception apply over them. The province’s regulations summary is the authority.
- Ice hut rules
- Removal dates and registration rules are set by fisheries management zone and change from time to time. The dates here were read from the province in September 2026. The province’s own fishing regulations are the authority.
Where these figures come from
- Depth, shoreline, islands and named places: Ontario Ministry of Natural Resources bathymetry and the Ontario Hydro Network, © King’s Printer for Ontario, Open Government Licence – Ontario.
- Phosphorus and water clarity: Ontario Lake Partner Program, Ministry of the Environment, Conservation and Parks, Open Government Licence – Ontario. Extract built 2026-08-09.
- Aerial photography: Ontario Imagery Web Map Service, Open Government Licence – Ontario, drawing this frame from Forest Resources Inventory 2007-2011 and Sentinel 2 2025, satellite.
- Official names: Geographic Names Ontario, Ministry of Natural Resources, Open Government Licence – Ontario. Marinas: Overture Maps Foundation places data, CDLA-Permissive 2.0.
- Lake outline and municipal boundaries: Ontario Hydro Network and Ontario municipal boundary records, Ministry of Natural Resources, Open Government Licence – Ontario.
- Fish species and thermal regime: Ontario Aquatic Resource Area records. Spawning areas: Ontario Fish Activity Area records. Both Ministry of Natural Resources, Open Government Licence – Ontario.
- Stocking: Historical Fish Stocking Data and Fish Stocking Data for Recreational Purposes, Ministry of Natural Resources, Open Government Licence – Ontario.
- Consumption advice: Guide to Eating Ontario Fish advisory database, 2025 edition, Ministry of the Environment, Conservation and Parks, Open Government Licence – Ontario.
- Seasons and limits: Ontario recreational fishing regulations data, Ministry of Natural Resources, Open Government Licence – Ontario.
- Fish plates: Charles Bradford Hudson; Duane Raver, U.S. Fish and Wildlife Service; Timothy Knepp, U.S. Fish and Wildlife Service; U.S. Fish and Wildlife Service. All public domain.
- Ice hut removal dates and registration: Ontario fishing regulations, read September 2026.