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Rating depth structure for splake.
Recent public catches load as you reach this section.
146-acre lake in Algoma District, Ontario. The lake tops out around 80 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from the Ontario MNRF survey of 1969, a decades-old survey (a transect sounding survey). Here's the year, species by species, as the scoring engine sees it.
Drawn out, this is 147 acres of water rimmed by 4.6 miles of bank, broken up by 2 islands. That shoreline is heavily fingered (development index 2.7) — bays, points and pockets everywhere, which multiplies the fishable edge. About 24% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Tip to tip the water measures near 1.3 mi with a 0.4-mi widest point. The water lies in Algoma District. For a second option, Lake Twentythree lies 0 mi south.
These fish are listed in an exact-water agency record as forage or ecological context. They are not target-species profiles and do not affect DepthScout's Prime, Good, or Fair spot ratings.
Official Ontario MNRF Fish ON-Line record. The listing documents source-recorded presence, not present abundance or guaranteed catchability.
Spring puts splake in skinny water — 5 to 25 ft is the zone. As the season builds they drop to 25 to 60 ft, wintering in 10 to 45 ft. Summer splake concentrate at Break off the point, a prime-rated drop-off around 55 ft. Warm-month bites cluster around early morning and the evening. A trolled spoon at the thermocline or a white tube jig (deep) covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Main-lake point (20 ft) | Small casting spoon (gold/orange), Inline spinner |
| Summer | 25 to 60 ft | dawn & dusk | Break off the point (55 ft) | Trolled spoon at the thermocline, White tube jig (deep) |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (20 ft) | Casting spoon, Jerkbait |
| Winter | 10 to 45 ft | dawn | Break off the point (55 ft) | Jigging spoon tipped with minnow head, Small white tube |
Spring puts brown bullhead in skinny water — 2 to 8 ft is the zone. As the season builds they drop to 3 to 12 ft, wintering in 10 to 25 ft. Spring brown bullhead concentrate at Shallow bay flat, a prime-rated weed flat around 2 ft. Warm-month bites cluster around after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (2 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (2 ft) | |
| Fall | 5 to 15 ft | dusk | Back-bay flat (13 ft) | |
| Winter | 10 to 25 ft | midday | open water |
Start shallow in spring: rainbow smelt sit in 2 to 20 ft that time of year. Summer pushes them deeper, 25 to 80 ft, and winter fish settle into 15 to 60 ft. The spot to know is Deep basin, a deep basin in about 80 ft of water that rates prime for rainbow smelt in summer. Warm-month bites cluster around early morning and the evening. Throw a tiny vertical jig or a small sabiki-style rig where legal until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 20 ft | night & dusk | Shallow feeding flat (22 ft) | Tiny silver jig, Micro spoon |
| Summer | 25 to 80 ft | dawn & dusk | Deep basin (80 ft) | Tiny vertical jig, Small sabiki-style rig where legal |
| Fall | 18 to 65 ft | dusk & dawn | Break off the point (55 ft) | Micro spoon, Tiny jig |
| Winter | 15 to 60 ft | dusk | Break off the point (55 ft) | Tiny glow jig, Micro jigging spoon |
7 pieces of structure are mapped here — Deep basin, around 80 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Ompa Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Ompa Lake is about 80 ft (24 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1969, a decades-old survey (a transect sounding survey).
Anglers target splake, brown bullhead, rainbow smelt on Ompa Lake.
Break off the point is the top-rated area: a drop-off in about 55 ft of water that rates prime for splake in summer. The interactive chart above rates every spot for each species and season.
For splake, 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.
Fishing on Ompa Lake is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Twentythree 0 mi · Wolf Lake 1 mi · Minnow Lake 2 mi · Maybe L. 2 mi · Semiwite Lake 2 mi · Trappertwo L. 2 mi · Trapperthree L. 2 mi · Passion L. 2 mi · Lolligag Lake 3 mi · Fullerton Lake 3 mi · Samreid Lake 3 mi · Fleming L. 3 mi
See how Ompa Lake stacks up: best splake lakes in Ontario · best brown bullhead lakes in Ontario
More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.