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Fishing Big Lake: what the data says
234-acre lake near Sisters. The lake tops out around 70 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.
Rainbow Trout fishing at Big Lake
Spring rainbow trout on Big Lake hold shallow, usually 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. Break off the point is the standout, a drop-off at roughly 10 ft, rated prime for winter rainbow trout. Best bite is early morning and the evening. Tie on a dodger + spoon (deep troll) or a flutter spoon and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Jigging spoon, Tube jig (white) |
Notable structure
- Deep basin: deep basin, around 68 ft
- Secondary point: point, around 18 ft
- Break off the point: drop-off, around 10 ft
- Shallow bay flat: weed flat, around 9 ft
- Back-bay flat: weed flat, around 8 ft
- Main-lake point: point, around 6 ft
Common questions
How deep is Big Lake?
Big Lake is about 70 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 Big Lake?
Anglers target rainbow trout on Big Lake.
Where is the best fishing spot on Big Lake?
Break off the point is the top-rated area: a drop-off in about 10 ft of water that rates prime for rainbow trout in winter. Open the map above to see every rated spot for each species and season.
When is the best time to fish Big Lake?
For rainbow 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
Clear Lake · Hosmer Lake · Cougar Reservoir · Crane Prairie Reservoir · Charlton Lake · Haystack Reservoir
See how Big Lake stacks up: best rainbow trout lakes in Oregon
Browse all Oregon fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.