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Fishing Ost Lake: what the data says
478-acre lake near North Dakota. North Dakota Game & Fish survey water. The lake tops out around 17 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.
Walleye fishing at Ost Lake
Spring walleye on Ost Lake hold shallow, usually 4 to 15 ft. They move out to 5 to 17 ft in summer and finish the year down in 5 to 17 ft. If you only fish one area, make it Deep basin: a deep basin around 17 ft that scores prime in winter. In summer the feeding windows fall in the evening and early morning. A crawler harness on bottom bouncer or a deep crankbait (trolled) covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 5 to 17 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 5 to 17 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 5 to 17 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Yellow Perch fishing at Ost Lake
Spring yellow perch on Ost Lake hold shallow, usually 3 to 12 ft. By summer they slide out to 5 to 17 ft, and by winter most fish are in 5 to 17 ft. Deep basin is the standout, a deep basin at roughly 17 ft, rated prime for fall yellow perch. Plan around early morning in the warm months. 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 | 5 to 17 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 5 to 17 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 5 to 17 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Notable structure
- Deep basin: deep basin, around 17 ft
- Secondary point: point, around 3 ft
- Main-lake point: point, around 2 ft
- Shallow bay flat: weed flat, around 2 ft
- Back-bay flat: weed flat, around 2 ft
- Break off the point: drop-off, around 2 ft
Common questions
How deep is Ost Lake?
Ost Lake is about 17 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 Ost Lake?
Anglers target walleye, yellow perch on Ost Lake.
Where is the best fishing spot on Ost Lake?
Deep basin is the top-rated area: a deep basin in about 17 ft of water that rates prime for walleye in winter. Open the map above to see every rated spot for each species and season.
When is the best time to fish Ost Lake?
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
Railroad Lake · Mundt Lake · Lehr WMA · Miller Lake · Nagel Lake · Harr Lake
See how Ost Lake stacks up: best walleye lakes in North Dakota · best yellow perch lakes in North Dakota
Browse all North Dakota fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.