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Fishing Mary Gregg Lake: what the data says
27-acre lake near Cadomin. The lake tops out around 54 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Below is the species-by-species picture, pulled from the same data the map uses.
Brook Trout fishing at Mary Gregg Lake
In spring, brook trout run shallow here, mostly 2 to 15 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 3 to 20 ft. Break off the point is the standout, a drop-off at roughly 23 ft, rated prime for summer brook trout. Best bite is early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Small jigging spoon, Tungsten jig + plastic |
Brown Trout fishing at Mary Gregg Lake
Spring brown trout on Mary Gregg Lake hold shallow, usually 3 to 25 ft. They move out to 16 to 54 ft in summer and finish the year down in 5 to 35 ft. The spot to know is Break off the point, a drop-off in about 23 ft of water that rates prime for brown trout in summer. Plan around after dark and early morning in the warm months. Summer baits: a spoon at the thermocline or a deep stickbait (night) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 16 to 54 ft | night & dawn | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Jigging spoon, Small stickbait (slow) |
Rainbow Trout fishing at Mary Gregg Lake
Spring rainbow trout on Mary Gregg Lake hold shallow, usually 5 to 20 ft. By summer they slide out to 8 to 30 ft, and by winter most fish are in 8 to 40 ft. Break off the point is the standout, a drop-off at roughly 23 ft, rated prime for winter rainbow trout. Plan around early morning and the evening in the warm months. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Jigging spoon, Tube jig (white) |
Notable structure
- Deep basin: deep basin, around 53 ft
- Break off the point: drop-off, around 23 ft
- Main-lake point: point, around 22 ft
- Shallow bay flat: weed flat, around 10 ft
- Secondary point: point, around 7 ft
Common questions
How deep is Mary Gregg Lake?
Mary Gregg Lake is about 54 ft at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
What fish are in Mary Gregg Lake?
Anglers target rainbow trout, brown trout, brook trout on Mary Gregg Lake.
Where is the best fishing spot on Mary Gregg Lake?
Break off the point is the top-rated area: a drop-off in about 23 ft of water that rates prime for brown trout in summer. Open the map above to see every rated spot for each species and season.
When is the best time to fish Mary Gregg Lake?
For brook trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
Kinky Lake · Wildhorse Lakes · Jarvis Lake · Gregg Lake · Obed Lake · Fickle Lake
See how Mary Gregg Lake stacks up: best rainbow trout lakes in Alberta · best brown trout lakes in Alberta · best brook trout lakes in Alberta
Browse all Alberta fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.