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Fishing Diamond Lake (Mineral): what the data says
18-acre lake near Montana. The lake tops out around 25 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. Here is how the season plays out for each species, straight from the data behind the map.
Walleye fishing at Diamond Lake (Mineral)
Spring walleye on Diamond Lake (Mineral) hold shallow, usually 4 to 15 ft. Summer pushes them deeper, 8 to 25 ft, and winter fish settle into 8 to 25 ft. Break off the point is the standout, a drop-off at roughly 16 ft, rated prime for fall walleye. Best bite is the evening and early morning. Tie on a crawler harness on bottom bouncer or a deep crankbait (trolled) and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 8 to 25 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 8 to 25 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 8 to 25 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Northern Pike fishing at Diamond Lake (Mineral)
Spring northern pike on Diamond Lake (Mineral) hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. The spot to know is Break off the point, a drop-off in about 16 ft of water that rates prime for northern pike in fall. Best bite is early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Tip-ups, Large jigging spoon |
Yellow Perch fishing at Diamond Lake (Mineral)
Spring yellow perch on Diamond Lake (Mineral) hold shallow, usually 3 to 12 ft. Summer pushes them deeper, 8 to 25 ft, and winter fish settle into 8 to 25 ft. The spot to know is Deep basin, a deep basin in about 24 ft of water that rates prime for yellow perch in fall. Best bite is early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 25 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 25 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 25 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Smallmouth Bass fishing at Diamond Lake (Mineral)
In spring, smallmouth bass run shallow here, mostly 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 8 to 25 ft. If you only fish one area, make it Break off the point: a drop-off around 16 ft that scores prime in winter. 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 | 8 to 25 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 8 to 25 ft | midday | Blade bait, Hair jig |
Rainbow Trout fishing at Diamond Lake (Mineral)
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. They move out to 7 to 25 ft in summer and finish the year down in 5 to 25 ft. Break off the point is the standout, a drop-off at roughly 16 ft, rated prime for winter rainbow trout. In summer the feeding windows fall in early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 7 to 25 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 25 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 25 ft | dawn | Jigging spoon, Tube jig (white) |
Lake Trout fishing at Diamond Lake (Mineral)
Spring lake trout on Diamond Lake (Mineral) hold shallow, usually 6 to 25 ft. Summer fish stay in 8 to 25 ft, and winter fish hold in 6 to 25 ft. The spot to know is Deep basin, a deep basin in about 24 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 6 to 25 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 8 to 25 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 5 to 25 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 6 to 25 ft | dawn | White tube jig, Airplane jig |
Diamond Lake (Mineral) also holds crappie (10 to 25 ft in summer), channel catfish (8 to 25 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Notable structure
- Deep basin: deep basin, around 24 ft
- Break off the point: drop-off, around 16 ft
- Main-lake point: point, around 5 ft
- Secondary point: point, around 3 ft
Common questions
How deep is Diamond Lake (Mineral)?
Diamond Lake (Mineral) is about 25 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 Diamond Lake (Mineral)?
Anglers target smallmouth bass, walleye, northern pike, crappie, channel catfish, rainbow trout, yellow perch, lake trout on Diamond Lake (Mineral).
Where is the best fishing spot on Diamond Lake (Mineral)?
Break off the point is the top-rated area: a drop-off in about 16 ft of water that rates prime for walleye in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Diamond Lake (Mineral)?
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
Cliff Lake (Mineral) · Lost Lake (Mineral) · Bonanza Lake, Upper · Moore Lake (Mineral) · Oregon Lake, Middle · Hoodoo Lake
See how Diamond Lake (Mineral) stacks up: best smallmouth bass lakes in Montana · best walleye lakes in Montana · best northern pike lakes in Montana · best crappie lakes in Montana
Browse all Montana fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.