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Fishing Arrowrock Reservoir: what the data says
3,100-acre reservoir near Boise. The lake tops out around 223 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.
Kokanee fishing at Arrowrock Reservoir
In spring, kokanee run shallow here, mostly 10 to 30 ft. Summer pushes them deeper, 30 to 70 ft, and winter fish settle into 20 to 80 ft. Boise River inflow is the standout, a inflow / creek mouth at roughly 5 ft, rated prime for fall kokanee. Best bite is early morning. Tie on a dodger + pink/orange squid on downrigger or a kokanee bug + corn and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 30 to 70 ft | dawn | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 20 to 80 ft | dawn | Small glow jig + corn or maggot, Tiny spoon |
Rainbow Trout fishing at Arrowrock Reservoir
Spring rainbow trout on Arrowrock Reservoir 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. The spot to know is Boise River inflow, a inflow / creek mouth in about 5 ft of water that rates prime for rainbow trout in spring. In summer the feeding windows fall in early morning and the evening. 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 | 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) |
Smallmouth Bass fishing at Arrowrock Reservoir
Spring smallmouth bass on Arrowrock Reservoir hold shallow, usually 3 to 12 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 20 to 45 ft. If you only fish one area, make it Offshore hump: a offshore hump around 26 ft that scores prime in summer. Best bite is early morning and the evening. Summer baits: a drop shot (goby/minnow) or a ned rig gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Blade bait, Hair jig |
Yellow Perch fishing at Arrowrock Reservoir
Spring yellow perch on Arrowrock Reservoir hold shallow, usually 3 to 12 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 15 to 35 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 5 ft that scores prime 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 | 3 to 12 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Lake Whitefish fishing at Arrowrock Reservoir
Spring lake whitefish on Arrowrock Reservoir hold shallow, usually 15 to 45 ft. They move out to 40 to 90 ft in summer and finish the year down in 25 to 70 ft. If you only fish one area, make it Offshore hump: a offshore hump around 26 ft that scores prime in winter. In summer the feeding windows fall in early morning. Tie on a blade bait vertical or a small jigging spoon and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Jigging spoon + bead chain, Tungsten jig + waxie |
Notable structure
- Deep basin: deep basin, around 198 ft
- Deepest basin: deep basin, around 194 ft
- Main-lake point: point, around 69 ft
- Secondary point: point, around 59 ft
- Break off the point: drop-off, around 39 ft
- Shoreline point: point, around 36 ft
- Old creek channel: creek channel, around 33 ft
- Offshore hump: offshore hump, around 26 ft
- Shallow feeding flat: feeding flat, around 19 ft
- Offshore hump: offshore hump, around 18 ft
- Cottonwood Creek inflow: inflow / creek mouth, around 16 ft
- Feeding flat: feeding flat, around 16 ft
- Sharp break: drop-off, around 6 ft
- Shallow bay flat: weed flat, around 5 ft
Common questions
How deep is Arrowrock Reservoir?
Arrowrock Reservoir is about 223 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 Arrowrock Reservoir?
Anglers target smallmouth bass, rainbow trout, yellow perch, kokanee, lake whitefish on Arrowrock Reservoir.
Where is the best fishing spot on Arrowrock Reservoir?
Boise River inflow is the top-rated area: a inflow / creek mouth in about 5 ft of water that rates prime for rainbow trout in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Arrowrock Reservoir?
For kokanee, the summer bite is best in 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
Anderson Ranch Reservoir · Cascade Reservoir · Salmon River (Upper) · Lake Coeur d'Alene · Snake River (South Fork) · Henrys Fork
See how Arrowrock Reservoir stacks up: best rainbow trout lakes in Idaho · best kokanee lakes in Idaho
Browse all Idaho fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.