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Fishing La Harpe Reservoir: what the data says
10.7-acre lake near La Harpe. The lake tops out around 14 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. What follows comes from the same scoring engine that paints the spots above.
Bluegill fishing at La Harpe Reservoir
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. By summer they slide out to 4 to 14 ft, and by winter most fish are in 4 to 14 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 2 ft that scores prime in spring. In summer the feeding windows fall in 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 6 ft | midday & dusk | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 14 ft | dawn & dusk | Small sponge spider (fly), Micro tube jig |
| Fall | 4 to 14 ft | midday | Micro jig + waxworm, Small spoon tipped |
| Winter | 4 to 14 ft | midday | Tungsten ice jig + plastic, Tiny spoon |
Channel Catfish fishing at La Harpe Reservoir
Start shallow in spring: channel catfish sit in 3 to 12 ft that time of year. By summer they slide out to 4 to 14 ft, and by winter most fish are in 4 to 14 ft. If you only fish one area, make it Deep basin: a deep basin around 14 ft that scores prime in winter. In summer the feeding windows fall in after dark and the evening.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dusk | |
| Summer | 4 to 14 ft | night & dusk | |
| Fall | 4 to 14 ft | dusk | |
| Winter | 4 to 14 ft | midday |
Largemouth Bass fishing at La Harpe Reservoir
Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. By summer they slide out to 4 to 14 ft, and by winter most fish are in 4 to 14 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 2 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Summer baits: a texas-rigged 10" worm or a deep-diving crankbait gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Spinnerbait, Chatterbait |
| Summer | 4 to 14 ft | dawn & dusk | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 14 ft | midday & dawn | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 14 ft | midday | Blade bait, Jigging spoon |
Crappie fishing at La Harpe Reservoir
Start shallow in spring: crappie sit in 2 to 8 ft that time of year. They move out to 4 to 14 ft in summer and finish the year down in 4 to 14 ft. If you only fish one area, make it Deep basin: a deep basin around 14 ft that scores prime in winter. Plan around early morning and the evening in the warm months. Tie on a jig trolled/spider-rigged or a small crankbait (trolled) and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 4 to 14 ft | dawn & dusk | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 4 to 14 ft | dawn | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 4 to 14 ft | midday | Tungsten jig + soft plastic, Tiny jigging spoon |
Notable structure
- Deep basin: deep basin, around 14 ft
- Back-bay flat: weed flat, around 5 ft
- Shallow bay flat: weed flat, around 2 ft
Common questions
How deep is La Harpe Reservoir?
La Harpe Reservoir is about 14 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 La Harpe Reservoir?
Anglers target largemouth bass, crappie, bluegill, channel catfish on La Harpe Reservoir.
Where is the best fishing spot on La Harpe Reservoir?
Shallow bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for bluegill in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish La Harpe Reservoir?
For bluegill, 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
Carthage Reservoir · Mississippi River Pool 19 (Keokuk) · Vermont Lake · Siloam Springs Lake · Anderson Lake · Pittsfield Lake
See how La Harpe Reservoir stacks up: best largemouth bass lakes in Illinois · best crappie lakes in Illinois · best bluegill lakes in Illinois · best channel catfish lakes in Illinois
Browse all Illinois fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.