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Fishing Lake Armstrong: what the data says
31-acre lake near Bryant. The lake tops out around 24 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. Here is how the season plays out for each species, straight from the data behind the map.
Cutthroat Trout fishing at Lake Armstrong
Spring cutthroat trout on Lake Armstrong hold shallow, usually 3 to 15 ft. Summer pushes them deeper, 7 to 24 ft, and winter fish settle into 6 to 24 ft. Deep basin is the standout, a deep basin at roughly 24 ft, rated prime for winter cutthroat trout. In summer the feeding windows fall in early morning and the evening. A trolled spoon (small) or a inline spinner covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 7 to 24 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 5 to 24 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 6 to 24 ft | dawn | Small jigging spoon, Marabou jig |
Rainbow Trout fishing at Lake Armstrong
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. Summer pushes them deeper, 6 to 24 ft, and winter fish settle into 5 to 24 ft. The spot to know is Deep basin, a deep basin in about 24 ft of water that rates prime for rainbow trout in winter. 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 | 6 to 24 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 24 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 24 ft | dawn | Jigging spoon, Tube jig (white) |
Notable structure
- Deep basin: deep basin, around 24 ft
- Back-bay flat: weed flat, around 8 ft
- Shallow bay flat: weed flat, around 3 ft
Common questions
How deep is Lake Armstrong?
Lake Armstrong is about 24 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 Lake Armstrong?
Anglers target rainbow trout, cutthroat trout on Lake Armstrong.
Where is the best fishing spot on Lake Armstrong?
Deep basin is the top-rated area: a deep basin in about 24 ft of water that rates prime for cutthroat trout in winter. Open the map above to see every rated spot for each species and season.
When is the best time to fish Lake Armstrong?
For cutthroat 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
Bryant Lake · Sunday Lake · Lake McMurray · Lake Cavanaugh · Lake Loma · Lake Ki
See how Lake Armstrong stacks up: best rainbow trout lakes in Washington · best cutthroat trout lakes in Washington
Browse all Washington fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.