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39-acre lake in Park County, Montana. The lake tops out around 200 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. Species by species, here's what the data says the year looks like.
Courthouse Lake's chart carries 1.6 miles of bank. A development index of 2.2 means a maze of bays and points: far more casting targets than a round bowl of the same size. The shallow band under 15 ft claims about 6% of the surface — that's where the groceries are. Call it 0.5 mi long by 0.2 mi wide at the broadest reach. You'll find it in Park County. The nearest mapped water is Wrong Lake, 1 mi to the northwest.
Spring cutthroat trout on Courthouse Lake hold shallow, usually 3 to 15 ft. By summer they slide out to 10 to 35 ft, and by winter most fish are in 10 to 40 ft. The chart's best answer is Break off the point — drop-off, 28 ft, prime for summer. Prime time lands in early morning and the evening. The summer box starts with a trolled spoon (small) or an inline spinner.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (15 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (28 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (15 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (28 ft) | Small jigging spoon, Marabou jig |
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 194 ft.
Season dates, license requirements, and size and bag limits for Montana waters are set by the Montana Fish, Wildlife & Parks — and special regulations can apply to Courthouse Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Courthouse Lake is about 200 ft (61 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 cutthroat trout on Courthouse Lake.
Break off the point is the top-rated area: a drop-off in about 28 ft of water that rates prime for cutthroat trout in summer. Open the map above to see every rated spot for each species and season.
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.
Fishing on Courthouse Lake is regulated by the Montana Fish, Wildlife & Parks. Check the official Montana regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Wrong Lake 1 mi · Anvil Lake (Park) 2 mi · Cavity Lake 2 mi · Glacier Green Lake 2 mi · Goose Lake 2 mi · Huckleberry Lake 3 mi · Imelda Lake 4 mi · Zimmer Lake 4 mi · Long Lake (Park) 4 mi · Round Lake 4 mi · Corner Lake 5 mi · Aero Lake, Lower 5 mi
See how Courthouse Lake stacks up: best cutthroat trout lakes in Montana
More water nearby: Park County fishing maps (31 charts). Browse all Montana 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.