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Fishing Trumbull Lake: what the data says
1,439-acre lake near Clay County. Iowa DNR survey water. The lake tops out around 4 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.
Largemouth Bass fishing at Trumbull Lake
Start shallow in spring: largemouth bass sit in 1 to 4 ft that time of year. Summer fish stay in 1 to 4 ft, and winter fish hold in 1 to 4 ft. Shallow bay flat is the standout, a weed flat at roughly 2 ft, rated prime for spring largemouth bass. Plan around early morning and the evening in the warm months. Summer baits: a texas-rigged 10" worm or a deep-diving crankbait gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 4 ft | dawn & dusk | Spinnerbait, Chatterbait |
| Summer | 1 to 4 ft | dawn & dusk | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 1 to 4 ft | midday & dawn | Squarebill crankbait (shad), Spinnerbait |
| Winter | 1 to 4 ft | midday | Blade bait, Jigging spoon |
Bluegill fishing at Trumbull Lake
Start shallow in spring: bluegill sit in 1 to 4 ft that time of year. Summer fish stay in 1 to 4 ft, and winter fish hold in 1 to 4 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 2 ft that scores prime in spring. Best bite is early morning and the evening. A small sponge spider (fly) or a micro tube jig covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 4 ft | midday & dusk | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 1 to 4 ft | dawn & dusk | Small sponge spider (fly), Micro tube jig |
| Fall | 1 to 4 ft | midday | Micro jig + waxworm, Small spoon tipped |
| Winter | 1 to 4 ft | midday | Tungsten ice jig + plastic, Tiny spoon |
Crappie fishing at Trumbull Lake
Spring crappie on Trumbull Lake hold shallow, usually 1 to 4 ft. Summer fish stay in 1 to 4 ft, and winter fish hold in 1 to 4 ft. Deep basin is the standout, a deep basin at roughly 4 ft, rated prime for winter crappie. Plan around early morning and the evening in the warm months. A jig trolled/spider-rigged or a small crankbait (trolled) covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 4 ft | midday & dawn | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 1 to 4 ft | dawn & dusk | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 1 to 4 ft | dawn | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 1 to 4 ft | midday | Tungsten jig + soft plastic, Tiny jigging spoon |
Yellow Perch fishing at Trumbull Lake
In spring, yellow perch run shallow here, mostly 1 to 4 ft. Summer fish stay in 1 to 4 ft, and winter fish hold in 1 to 4 ft. The spot to know is Shallow bay flat, a weed flat in about 2 ft of water that rates prime for yellow perch in spring. Best bite is early morning. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 4 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 1 to 4 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 1 to 4 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 1 to 4 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Channel Catfish fishing at Trumbull Lake
In spring, channel catfish run shallow here, mostly 1 to 4 ft. Summer fish stay in 1 to 4 ft, and winter fish hold in 1 to 4 ft. Deep basin is the standout, a deep basin at roughly 4 ft, rated prime for winter channel catfish. Plan around after dark and the evening in the warm months.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 4 ft | dusk | |
| Summer | 1 to 4 ft | night & dusk | |
| Fall | 1 to 4 ft | dusk | |
| Winter | 1 to 4 ft | midday |
Notable structure
- Deep basin: deep basin, around 4 ft
- Break off the point: drop-off, around 4 ft
- Main-lake point: point, around 2 ft
- Secondary point: point, around 2 ft
- Shallow bay flat: weed flat, around 2 ft
- Back-bay flat: weed flat, around 2 ft
Common questions
How deep is Trumbull Lake?
Trumbull Lake is about 4 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 Trumbull Lake?
Anglers target largemouth bass, crappie, bluegill, channel catfish, yellow perch on Trumbull Lake.
Where is the best fishing spot on Trumbull Lake?
Shallow bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for largemouth bass in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Trumbull Lake?
For largemouth bass, 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
Lost Island Lake · Virgin Lake · Elk Lake · Twelve Mile Lake · Silver Lake (Palo Alto) · Lower Gar Lake
See how Trumbull Lake stacks up: best largemouth bass lakes in Iowa · best crappie lakes in Iowa · best bluegill lakes in Iowa · best channel catfish lakes in Iowa
Browse all Iowa fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.