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77-acre lake near Cass County. The lake tops out around 30 ft. The depth data here comes from the Minnesota DNR survey of 1979, a decades-old survey (the DNR's original lake-survey map). The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 77 acres, worked by 1.9 miles of shoreline. With a 1.5 development index there's bank structure worth casting at, in moderation. Roughly 73% of the water is 15 ft or less, the band where the food chain lives. Call it 0.6 mi long by 0.4 mi wide at the broadest reach. It sits in Cass County. Its nearest charted neighbour, Bluebill, is 1 mi to the southwest.
Early season rainbow trout use the shallows, holding in 5 to 20 ft. Expect a summer slide to 8 to 30 ft, then a winter hold in 6 to 30 ft. Put Break off the point first on the milk run — a drop-off near 24 ft that grades prime for winter. In summer the feeding windows fall in 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 | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (24 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 9 to 30 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 6 to 30 ft | dawn | Break off the point (24 ft) | Jigging spoon, Tube jig (white) |
6 pieces of structure are mapped here — Deep basin, around 30 ft, is the deepest of them.
Access data: MN DNR Water Access Sites (struc_water_access_sites), Minnesota Geospatial Commons. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| 2025* | Rainbow Trout (yearlings) | 100 | — |
| 2025* | Rainbow Trout (adults) | 102 | — |
| 2024* | Rainbow Trout (yearlings) | 1,500 | — |
| 2024* | Rainbow Trout (fingerlings) | 7,000 | — |
* Approximate date (agency reports month or season only). Source: Minnesota DNR LakeFinder stocking reports, retrieved 2026-08-18.
Season dates, license requirements, and size and bag limits for Minnesota waters are set by the Minnesota DNR — and special regulations can apply to Diamond specifically, so confirm the current rules before you fish.
Check the official Minnesota fishing regulations →
Diamond is about 30 ft (9 m) deep at its deepest point. The depth data here comes from the Minnesota DNR survey of 1979, a decades-old survey (the DNR's original lake-survey map).
Anglers target rainbow trout on Diamond.
Break off the point is the top-rated area: a drop-off in about 24 ft of water that rates prime for rainbow trout in winter. Open the map above to see every rated spot for each species and season.
For rainbow 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.
Yes — per Minnesota DNR LakeFinder stocking reports records, Diamond was most recently stocked 2025 with 100 rainbow trout (yearlings). The full stocking history is listed above.
Fishing on Diamond is regulated by the Minnesota DNR. Check the official Minnesota regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Bluebill 1 mi · Hovde 1 mi · Long 1 mi · Four-One-Eight 2 mi · Little Webb 2 mi · Teepee 2 mi · Big Hanson 2 mi · South Stocking 3 mi · Stony 3 mi · Hanson 3 mi · Larson 3 mi · Webb 3 mi
See how Diamond stacks up: best rainbow trout lakes in Minnesota
More water nearby: Cass County fishing maps (217 charts). Browse all Minnesota fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.