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Rating depth structure for cutthroat trout.
Recent public catches load as you reach this section.
21-acre lake in Park County, Montana. The lake tops out around 60 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 25 acres of water rimmed by 1.2 miles of bank, with a single island in the mix. Index 1.7 on the shoreline: a few honest points and pockets, nothing labyrinthine. Roughly 35% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 0.4 mi, about 0.2 mi across. You'll find it in Park County. Closest neighbour on DepthScout: Russell Lake, 1 mi east of here.
Early season cutthroat trout use the shallows, holding in 3 to 15 ft. Expect a summer slide to 10 to 35 ft, then a winter hold in 10 to 40 ft. Put Break off the point first on the milk run — a drop-off near 37 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a trolled spoon (small) or an inline spinner and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (14 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (37 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (14 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (37 ft) | Small jigging spoon, Marabou jig |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 60 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 Aquarius Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Aquarius Lake is about 60 ft (18 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target cutthroat trout on Aquarius Lake.
Break off the point is the top-rated area: a drop-off in about 37 ft of water that rates prime for cutthroat trout in summer. The map above holds the full rated-spot list for every 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 Aquarius 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.
Russell Lake 1 mi · Bald Knob Lake 2 mi · Broadwater Lake 2 mi · Sodalite Lake 2 mi · Lake Of The Clouds 2 mi · Fox Lake (Park) 2 mi · Diamond Lake (Carbon) 2 mi · Canyon Lake (Carbon) 2 mi · Fossil Lake (Carbon) 3 mi · Fizzle Lake (Windy Lake/Dead Horse Lake) 3 mi · Mariane Lake 3 mi · Lake Of The Winds 3 mi
See how Aquarius Lake stacks up: best cutthroat trout lakes in Montana
More water nearby: Park County fishing maps (31 charts). Browse all Montana fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.