O'Brien Lakes
One lake, 3 charted basins — combined figures below.
Surface area
38 ac15 ha
Max depth
20 ft6 m
Mean depth
8 ft2.5 m
Water type
Cold-water
Mgmt zone
FMZ 7
Shoreline
2.6 mi4.2 km
Depth map
None on file
O'Brien Lakes is the 3641st-largest of 5,104 named lakes in Algoma Country, with 2.6 miles of charted shoreline and 1 island.
Fish species
From MNRF aquatic resource surveys.
Also present: Brook Stickleback, Fathead Minnow, Northern Pearl Dace, Northern Redbelly Dace
Stocked: Brook Trout (most recently 2025).
Lodges & operators0
No operators recorded on this lake yet. Know one? It may be listed under a nearby community — browse the map.
Stocking history
MNRF recreational fish stocking recorded for this water.
| Year | Species | Fish stocked |
|---|---|---|
| 2025 | Brook Trout | 500 |
| 2021 | Brook Trout | 450 |
| 2019 | Brook Trout | 500 |
Similar water
Same region, overlapping species, comparable size.
- Moon Lake5 shared species · 36 ac
- Indian Lake5 shared species · 35 ac
- West Joco Lake5 shared species · 42 ac
- Boat Lake5 shared species · 46 ac
- Little Amy Lake5 shared species · 29 ac
Nearby lakes
- Oganek Lake0.8 mi · species data
- Caribou Lake3.9 mi · species data
- Saniga Lake4.9 mi · species data
- Leo's Lake3.5 mi
- Kauskanee Lake3.5 mi · species data
- Mink Lake5.6 mi · species data