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52-acre lake near Grant County. The lake tops out around 50 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. Below is the species-by-species picture, pulled from the same data the map uses.
On the chart, Windmill Lake draws 52 acres inside 1.3 miles of shoreline. The basin is a simple one (shoreline index 1.2) — close to a bowl, so the structure on the chart matters more than the bank. The shallow band under 15 ft claims about 35% of the surface — that's where the groceries are. Tip to tip the water measures near 0.6 mi with a 0.2-mi widest point. The water lies in Grant County. For a second option, Canal Lake lies 1 mi southwest.
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 8 to 40 ft for winter. Winter rainbow trout concentrate at Break off the point, a prime-rated drop-off around 7 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (5 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (7 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Secondary point (14 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (7 ft) | Jigging spoon, Tube jig (white) |
The chart marks 6 structure features on Windmill Lake; the deepest is Deep basin at about 46 ft.
Access data: Washington WDFW — Water Access Sites. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Apr 27 | Rainbow trout | 9,000 | — |
Source: WDFW fish-stocking reports, retrieved 2026-08-18.
Season dates, license requirements, and size and bag limits for Washington waters are set by the Washington Department of Fish and Wildlife — and special regulations can apply to Windmill Lake specifically, so confirm the current rules before you fish.
Check the official Washington fishing regulations →
Windmill Lake is about 50 ft (15 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target rainbow trout on Windmill Lake.
Break off the point is the top-rated area: a drop-off in about 7 ft of water that rates prime for rainbow trout in winter. Scroll up to the map for the complete spot list by 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 WDFW fish-stocking reports records, Windmill Lake was most recently stocked Apr 27 with 9,000 rainbow trout. The full stocking history is listed above.
Fishing on Windmill Lake is regulated by the Washington Department of Fish and Wildlife. Check the official Washington regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Canal Lake 1 mi · Long Lake 1 mi · Soda Lake 4 mi · Upper Goose Lake 5 mi · Lower Goose Lake 5 mi · Potholes Reservoir 9 mi · Moses Lake 17 mi · Saddle Mountain Lake 28 mi · Soap Lake 36 mi · Evergreen Reservoir 37 mi · Burke Lake 38 mi · Quincy Lake 38 mi
See how Windmill Lake stacks up: best rainbow trout lakes in Washington
More water nearby: Grant County fishing maps (18 charts). Browse all Washington 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.