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35-acre lake in Algoma District, Ontario. The lake tops out around 108 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Species by species, here's what the data says the year looks like.
The outline encloses 35 acres, worked by 1 miles of shoreline. Nearly circular (index 1.2), so the story is the bottom, not the bank. About 8% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Call it 0.3 mi long by 0.2 mi wide at the broadest reach. Algoma District claims this one. If the bite dies, Chubb Lake is 1 mi to the north.
Spring brook trout on Gaudry L. 21 (Moon L.) hold shallow, usually 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. Put Shallow bay flat first on the milk run — a feeding flat near 6 ft that grades good for spring. The feeding windows run early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (6 ft) | Small jigging spoon, Tungsten jig + plastic |
Come spring, look for lake trout tight to the bank in 10 to 40 ft. They move out to 32 to 108 ft in summer and finish the year down in 20 to 80 ft. If you only fish one area, make it Deep basin: a deep basin around 92 ft that scores prime in summer. Best bite is early morning. A white tube jig (deep) or a magnum spoon on downrigger is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (27 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 32 to 108 ft | dawn | Deep basin (92 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (27 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (49 ft) | White tube jig, Airplane jig |
5 pieces of structure are mapped here — Deep basin, around 92 ft, is the deepest of them.
Access data: Geospatial Ontario - Fishing Access Points. Confirm conditions and fees locally before you launch.
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 Gaudry L. 21 (Moon L.) specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Gaudry L. 21 (Moon L.) is about 108 ft (33 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brook trout, lake trout on Gaudry L. 21 (Moon L.).
Deep basin is the top-rated area: a deep basin in about 92 ft of water that rates prime for lake trout in summer. Scroll up to the map for the complete spot list by species and season.
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.
Fishing on Gaudry L. 21 (Moon L.) 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.
Chubb Lake 1 mi · Ragged Lake 1 mi · Cowie Lake 2 mi · Point Lake 2 mi · Poem L. 2 mi · Nahwegezhic L. 2 3 mi · Eileen Lake 3 mi · Hanes Lake 4 mi · Coppens Lake 4 mi · Nahwegezhic L. 4 4 mi · Graham Lake 4 mi · Private Lake 5 mi
See how Gaudry L. 21 (Moon L.) stacks up: best lake trout lakes in Ontario · best brook trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps or see every water on DepthScout. 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.