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Fishing Foster Reservoir: what the data says
129-acre reservoir near Franklin. The lake tops out around 13 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. What follows comes from the same scoring engine that paints the spots above.
Cutthroat Trout fishing at Foster Reservoir
In spring, cutthroat trout run shallow here, mostly 3 to 13 ft. Summer fish stay in 4 to 13 ft, and winter fish hold in 3 to 13 ft. Main-lake point is the standout, a point at roughly 8 ft, rated prime for fall cutthroat trout. Plan around early morning and the evening in the warm months. Tie on a trolled spoon (small) or a inline spinner and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 13 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 4 to 13 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 3 to 13 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 3 to 13 ft | dawn | Small jigging spoon, Marabou jig |
Rainbow Trout fishing at Foster Reservoir
Start shallow in spring: rainbow trout sit in 3 to 13 ft that time of year. Summer fish stay in 3 to 13 ft, and winter fish hold in 3 to 13 ft. If you only fish one area, make it Main-lake point: a point around 8 ft that scores prime in spring. Plan around early morning and the evening in the warm months. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 13 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 3 to 13 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 4 to 13 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 3 to 13 ft | dawn | Jigging spoon, Tube jig (white) |
Notable structure
- Deep basin: deep basin, around 11 ft
- Main-lake point: point, around 8 ft
- Secondary point: point, around 8 ft
- Shallow bay flat: weed flat, around 3 ft
- Back-bay flat: weed flat, around 3 ft
Common questions
How deep is Foster Reservoir?
Foster Reservoir is about 13 ft (4 m) deep 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 Foster Reservoir?
Anglers target rainbow trout, cutthroat trout on Foster Reservoir.
Where is the best fishing spot on Foster Reservoir?
Main-lake point is the top-rated area: a point in about 8 ft of water that rates prime for cutthroat trout in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Foster Reservoir?
For cutthroat 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
Lamont Reservoir · Treasureton Reservoir · Oneida Narrows Reservoir · Bear Lake · Chesterfield Reservoir · Stone Reservoir
See how Foster Reservoir stacks up: best rainbow trout lakes in Idaho · best cutthroat trout lakes in Idaho
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