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14-acre lake in Park County, Montana. The lake tops out around 20 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. Every species below gets its seasonal read from the same numbers driving the chart.
On the chart, Long Lake (Park) draws 17 acres inside 1.1 miles of shoreline. The shoreline is moderately structured (index 1.9) — enough points and pockets to pattern. 88% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 0.4 mi end to end and 0.2 mi across at its widest. You'll find it in Park County. The nearest mapped water is Round Lake, 1 mi to the southeast.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Summer pushes them deeper, 6 to 20 ft, and winter fish settle into 3 to 20 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for summer brook trout. Time it for early morning and the evening. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 6 to 20 ft | dawn & dusk | Deep basin (20 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (10 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Deep basin (20 ft) | Small jigging spoon, Tungsten jig + plastic |
Come spring, look for cutthroat trout tight to the bank in 3 to 15 ft. Expect a summer slide to 6 to 20 ft, then a winter hold in 5 to 20 ft. Start at Break off the point. It's a drop-off holding about 18 ft of water and rates prime come summer. Prime time lands in early morning and the evening. A trolled spoon (small) or an inline spinner is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 6 to 20 ft | dawn & dusk | Break off the point (18 ft) | Trolled spoon (small), Inline spinner |
| Fall | 4 to 20 ft | dawn & dusk | Main-lake point (10 ft) | Casting spoon, Inline spinner |
| Winter | 5 to 20 ft | dawn | Break off the point (18 ft) | Small jigging spoon, Marabou jig |
Long Lake (Park) carries 4 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 20 ft down.
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 Long Lake (Park) specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Long Lake (Park) is about 20 ft (6 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 brook trout, cutthroat trout on Long Lake (Park).
Break off the point is the top-rated area: a drop-off in about 18 ft of water that rates prime for cutthroat trout in summer. Scroll up to the map for the complete spot list by species and season.
For brook 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 Long Lake (Park) 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.
Round Lake 1 mi · Huckleberry Lake 1 mi · Corner Lake 1 mi · Lady Of The Lake 1 mi · Goose Lake 2 mi · Anvil Lake (Park) 3 mi · Zimmer Lake 3 mi · Aero Lake, Lower 3 mi · Broadwater Lake 3 mi · Cavity Lake 4 mi · Courthouse Lake 4 mi · Recruitment Lake 4 mi
See how Long Lake (Park) stacks up: best brook trout lakes in Montana · 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.