Lake depth chart
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3,700-acre lake near Anaconda. The lake tops out around 25 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Georgetown Lake runs 2,864 acres with 12.5 miles of edge. Index 1.7 on the shoreline: a few honest points and pockets, nothing labyrinthine. Littoral water — the productive band under ~15 ft — makes up 55% of this chart. Call it 3.7 mi long by 2.4 mi wide at the broadest reach. You'll find it in Granite County. Closest neighbour on DepthScout: Echo Lake (Granite), 3 mi north of here.
Start shallow in spring: kokanee sit in 8 to 25 ft that time of year. They don't go far with the seasons — 8 to 25 ft covers summer, 6 to 25 ft covers winter. The spot to know is Deep basin, a deep basin in about 25 ft of water that rates prime for kokanee in spring. Warm-month bites cluster around early morning. Throw a dodger + pink/orange squid on downrigger or a kokanee bug + corn until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 25 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (25 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 8 to 25 ft chart-limited; documented 30 to 70 ft | dawn | Deep basin (25 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 3 to 25 ft chart-limited; documented 5 to 40 ft | dawn | Deep basin (25 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 6 to 25 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (25 ft) | Small glow jig + corn or maggot, Tiny spoon |
Start shallow in spring: brook trout sit in 2 to 15 ft that time of year. Summer pushes them deeper, 8 to 25 ft, and winter fish settle into 3 to 20 ft. The spot to know is Gravel shoal, a gravel shoal in about 4 ft of water that rates prime for brook trout in fall. Warm-month bites cluster around early morning and the evening. Throw a small spoon fished deep or a trolled lake-clear wobbler + worm until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Gravel shoal (4 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 8 to 25 ft chart-limited; documented 10 to 30 ft | dawn & dusk | Deep basin (25 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Gravel shoal (4 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Gravel shoal (4 ft) | Small jigging spoon, Tungsten jig + plastic |
Start shallow in spring: lake trout sit in 6 to 25 ft that time of year. They don't go far with the seasons — 8 to 25 ft covers summer, 6 to 25 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 25 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a white tube jig (deep) or a magnum spoon on downrigger until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 25 ft chart-limited; documented 10 to 40 ft | dawn & dusk | Gravel shoal (4 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 8 to 25 ft chart-limited; documented 50 to 120 ft | dawn | Deep basin (25 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 5 to 25 ft chart-limited; documented 10 to 50 ft | dusk & dawn | Gravel shoal (4 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 6 to 25 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (25 ft) | White tube jig, Airplane jig |
Early season cutthroat trout use the shallows, holding in 3 to 15 ft. Expect a summer slide to 7 to 25 ft, then a winter hold in 6 to 25 ft. Put Break off the point first on the milk run — a drop-off near 15 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a trolled spoon (small) or an inline spinner and you're in the game.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Gravel shoal (4 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 7 to 25 ft chart-limited; documented 10 to 35 ft | dawn & dusk | Break off the point (15 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Gravel shoal (4 ft) | Casting spoon, Inline spinner |
| Winter | 6 to 25 ft chart-limited; documented 10 to 40 ft | dawn | Break off the point (15 ft) | Small jigging spoon, Marabou jig |
The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. As the season builds they drop to 7 to 25 ft, wintering in 5 to 25 ft. Top water on the chart: Break off the point, a drop-off in the 15 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Gravel shoal (4 ft) | Inline spinner (silver), Small spoon |
| Summer | 7 to 25 ft chart-limited; documented 8 to 30 ft | dawn & dusk | Break off the point (15 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 25 ft chart-limited; documented 10 to 35 ft | dawn & dusk | Gravel shoal (4 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 25 ft chart-limited; documented 8 to 40 ft | dawn | Break off the point (15 ft) | Jigging spoon, Tube jig (white) |
Structure-wise the chart holds 12 features, led in depth by Deep basin at roughly 25 ft.
Access data: Montana FWP — Fishing Access Sites. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Montana waters are set by the Montana Fish, Wildlife & Parks — and special regulations can apply to Georgetown Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Georgetown Lake is about 25 ft (8 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target kokanee, brook trout, lake trout, cutthroat trout, rainbow trout on Georgetown Lake.
Deep basin is the top-rated area: a deep basin in about 25 ft of water that rates prime for kokanee in spring. The map above holds the full rated-spot list for every species and season.
For kokanee, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Georgetown Lake is regulated by the Montana Fish, Wildlife & Parks. Check the official Montana regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Echo Lake (Granite) 3 mi · Upper Seymour Lake 11 mi · Rainbow Lake (Deer Lodge) 18 mi · Mystic Lake 26 mi · Mussigbrod Lake 32 mi · Lily Lake (Beaverhead) 39 mi · Sand Lake 39 mi · Beavertail Pond 40 mi · Baldy Lake 41 mi · Bitterroot River 46 mi · Bear Lake (Beaverhead) 47 mi · Nevada Reservoir 48 mi
See how Georgetown Lake stacks up: best rainbow trout lakes in Montana · best lake trout lakes in Montana · best brook trout lakes in Montana · best kokanee lakes in Montana
Browse all Montana 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.