Sign inSign up free Sign inSign up free Sign inSign up freeShared by DepthScout anglers. Exact spots stay private, always.
134-acre lake in Sudbury District, Ontario. The lake tops out around 40 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. What the data behind the map says about each species, season by season:
Ruth-Roy Lake maps at 135 acres behind 3.8 miles of shoreline — one island included. The 2.4 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. Littoral water — the productive band under ~15 ft — makes up 59% of this chart. Call it 1.4 mi long by 0.4 mi wide at the broadest reach. It sits in Sudbury District. Johnnie Lake sits 1 mi northeast — the closest neighbouring chart.
Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 3 to 20 ft. Put Break off the point first on the milk run — a drop-off near 20 ft that grades prime for summer. In summer the feeding windows fall in 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 | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (20 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (6 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (20 ft) | Small jigging spoon, Tungsten jig + plastic |
When the water first warms, lake trout slide up into 10 to 40 ft. There's no big seasonal slide here — summer means 12 to 40 ft, winter 10 to 40 ft. If you only fish one area, make it Deep basin: a deep basin around 38 ft that scores prime in summer. In summer the feeding windows fall in early morning. Keep a white tube jig (deep) or a magnum spoon on downrigger rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Break off the point (20 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 12 to 40 ft | dawn | Deep basin (38 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 8 to 40 ft | dusk & dawn | Main-lake point (6 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 10 to 40 ft | dawn | Deep basin (38 ft) | White tube jig, Airplane jig |
7 pieces of structure are mapped here — Deep basin, around 38 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 Ruth-Roy Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Ruth-Roy Lake is about 40 ft (12 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target brook trout, lake trout on Ruth-Roy Lake.
Deep basin is the top-rated area: a deep basin in about 38 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each 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 Ruth-Roy 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.
Johnnie Lake 1 mi · Clearsilver Lake 2 mi · Sandy Lake 2 mi · Whiskeyjack Lake 2 mi · Carlyle Lake 2 mi · Log Boom Lake 2 mi · Terry Lake 2 mi · Partridge Lake 3 mi · Norway Lake 3 mi · Turbid Lake 3 mi · Boundary Lake 4 mi · Proulx Lake 4 mi
See how Ruth-Roy Lake stacks up: best lake trout lakes in Ontario · best brook trout lakes in Ontario
More water nearby: Sudbury District fishing maps (868 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.