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Fishing Rock River: what the data says
Rockford to Sterling-Rock Falls: walleye below every dam and some of Illinois' best flathead water. The river tops out around 15 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Below is the species-by-species picture, pulled from the same data the map uses.
Walleye fishing at Rock River
Spring walleye on Rock River hold shallow, usually 4 to 15 ft. Summer fish stay in 5 to 15 ft, and winter fish hold in 5 to 15 ft. The spot to know is Kishwaukee River confluence, a inflow / creek mouth in about 8 ft of water that rates prime for walleye in spring. Plan around the evening and early morning in the warm months. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 5 to 15 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 5 to 15 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 5 to 15 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Flathead Catfish fishing at Rock River
In spring, flathead catfish run shallow here, mostly 4 to 15 ft. Summer fish stay in 4 to 15 ft, and winter fish hold in 5 to 15 ft. Tailout eddy (mile 62.8) is the standout, a eddy pocket at roughly 8 ft, rated prime for spring flathead catfish. Best bite is after dark and the evening.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | night & dusk | |
| Summer | 4 to 15 ft | night & dusk | |
| Fall | 4 to 15 ft | night & dusk | |
| Winter | 5 to 15 ft | midday |
Channel Catfish fishing at Rock River
Spring channel catfish on Rock River hold shallow, usually 3 to 12 ft. Summer pushes them deeper, 5 to 15 ft, and winter fish settle into 5 to 15 ft. If you only fish one area, make it Kishwaukee River confluence: a inflow / creek mouth around 8 ft that scores prime in spring. Plan around after dark and the evening in the warm months.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dusk | |
| Summer | 5 to 15 ft | night & dusk | |
| Fall | 5 to 15 ft | dusk | |
| Winter | 5 to 15 ft | midday |
White Bass fishing at Rock River
Start shallow in spring: white bass sit in 2 to 12 ft that time of year. Summer pushes them deeper, 5 to 15 ft, and winter fish settle into 5 to 15 ft. The spot to know is Kishwaukee River confluence, a inflow / creek mouth in about 8 ft of water that rates prime for white bass in spring. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 12 ft | dawn & dusk | see map |
| Summer | 5 to 15 ft | dawn & dusk | see map |
| Fall | 4 to 15 ft | dawn & dusk | see map |
| Winter | 5 to 15 ft | midday | see map |
Smallmouth Bass fishing at Rock River
Start shallow in spring: smallmouth bass sit in 3 to 12 ft that time of year. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. If you only fish one area, make it Byron rapids: a rock pile around 6 ft that scores prime in spring. Plan around early morning and the evening in the warm months. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Ned rig, Tube jig |
| Summer | 5 to 15 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 5 to 15 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 5 to 15 ft | midday | Blade bait, Hair jig |
Northern Pike fishing at Rock River
Start shallow in spring: northern pike sit in 2 to 8 ft that time of year. Summer pushes them deeper, 5 to 15 ft, and winter fish settle into 5 to 15 ft. The spot to know is Kishwaukee River confluence, a inflow / creek mouth in about 8 ft of water that rates prime for northern pike in spring. Plan around early morning and the evening in the warm months. A bucktail or a weedless spoon over cabbage covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | #5 inline spinner, Spoon (red/white) |
| Summer | 5 to 15 ft | dawn & dusk | Bucktail, Weedless spoon over cabbage |
| Fall | 5 to 15 ft | midday & dawn | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Tip-ups, Large jigging spoon |
Rock River also holds freshwater drum (4 to 15 ft in summer), common carp (3 to 15 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Notable structure
- Lowhead weir tailrace: dam tailrace, around 13 ft
- Oregon Dam tailrace: dam tailrace, around 13 ft
- Fordam Dam tailrace: dam tailrace, around 13 ft
- Rock River Dam tailrace: dam tailrace, around 13 ft
- Dam tailrace: dam tailrace, around 13 ft
- Upper Sterling Dam tailrace: dam tailrace, around 13 ft
- Sterling–Rock Falls dam: creek channel, around 12 ft
- Fordam dam tailrace (Rockford): creek channel, around 11 ft
- Outside-bend hole (mile 2.2): creek channel, around 11 ft
- Outside-bend hole (mile 4.0): creek channel, around 11 ft
- Outside-bend hole (mile 8.1): creek channel, around 11 ft
- Outside-bend hole (mile 11.8): creek channel, around 11 ft
- Outside-bend hole (mile 18.0): creek channel, around 11 ft
- Outside-bend hole (mile 21.8): creek channel, around 11 ft
Common questions
How deep is Rock River?
Rock River is about 15 ft at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
What fish are in Rock River?
Anglers target smallmouth bass, walleye, white bass, northern pike, channel catfish, flathead catfish, freshwater drum, common carp on Rock River.
Where is the best fishing spot on Rock River?
Kishwaukee River confluence is the top-rated area: a inflow / creek mouth in about 8 ft of water that rates prime for walleye in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Rock River?
For walleye, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
Olson Lake · Shabbona Lake · Mississippi River Pool 13 (Clinton) · Illinois River · Fox River · Boulder Lake
See how Rock River stacks up: best smallmouth bass lakes in Illinois · best walleye lakes in Illinois · best white bass lakes in Illinois · best northern pike lakes in Illinois
Browse all Illinois fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.