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Fishing Grassy Lake Reservoir: what the data says
318-acre reservoir near Jackson Region. The lake tops out around 103 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 Grassy Lake Reservoir
Start shallow in spring: cutthroat trout sit in 3 to 15 ft that time of year. They move out to 10 to 35 ft in summer and finish the year down in 10 to 40 ft. If you only fish one area, make it Main-lake point: a point around 26 ft that scores prime in summer. 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 15 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Small jigging spoon, Marabou jig |
Lake Trout fishing at Grassy Lake Reservoir
Spring lake trout on Grassy Lake Reservoir hold shallow, usually 10 to 40 ft. By summer they slide out to 31 to 103 ft, and by winter most fish are in 20 to 80 ft. The spot to know is Deep basin, a deep basin in about 88 ft of water that rates prime for lake trout in summer. In summer the feeding windows fall in early morning. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 31 to 103 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | White tube jig, Airplane jig |
Rainbow Trout fishing at Grassy Lake Reservoir
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Summer pushes them deeper, 8 to 30 ft, and winter fish settle into 8 to 40 ft. Main-lake point is the standout, a point at roughly 26 ft, rated prime for fall rainbow trout. Best bite is early morning and the evening. Tie on a dodger + spoon (deep troll) or a flutter spoon and you're in the game.
| 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) |
Notable structure
- Deep basin: deep basin, around 88 ft
- Break off the point: drop-off, around 46 ft
- Main-lake point: point, around 26 ft
- Secondary point: point, around 26 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
Common questions
How deep is Grassy Lake Reservoir?
Grassy Lake Reservoir is about 103 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 Grassy Lake Reservoir?
Anglers target rainbow trout, lake trout, cutthroat trout on Grassy Lake Reservoir.
Where is the best fishing spot on Grassy Lake Reservoir?
Deep basin is the top-rated area: a deep basin in about 88 ft of water that rates prime for lake trout in summer. Open the map above to see every rated spot for each species and season.
When is the best time to fish Grassy Lake 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
Tillery Lake · Fish Lake · Jackson Lake · Bearpaw Lake · Holly Lake · Lake Solitude
See how Grassy Lake Reservoir stacks up: best rainbow trout lakes in Wyoming · best lake trout lakes in Wyoming · best cutthroat trout lakes in Wyoming
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