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22-acre lake in Park County, Montana. The lake tops out around 30 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. The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 24 acres, worked by 0.9 miles of shoreline. A shoreline index of 1.3 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 70% of the water is 15 ft or less, the band where the food chain lives. Figure 0.3 mi of water from one end to the other, 0.2 mi at the beam. It sits in Park County. Corner Lake sits 0 mi southeast — the closest neighbouring chart.
When the water first warms, brook trout slide up into 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. If you only fish one area, make it Deep basin: a deep basin around 30 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (5 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (30 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (5 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (12 ft) | Small jigging spoon, Tungsten jig + plastic |
Round Lake carries 3 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 30 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 Round Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Round Lake is about 30 ft (9 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 on Round Lake.
Deep basin is the top-rated area: a deep basin in about 30 ft of water that rates prime for brook trout in summer. The interactive chart above rates every spot for each 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 Round 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.
Corner Lake 0 mi · Long Lake (Park) 1 mi · Lady Of The Lake 1 mi · Huckleberry Lake 1 mi · Goose Lake 3 mi · Broadwater Lake 3 mi · Aero Lake, Lower 3 mi · Anvil Lake (Park) 3 mi · Zimmer Lake 3 mi · Recruitment Lake 4 mi · Cavity Lake 4 mi · Courthouse Lake 4 mi
See how Round Lake stacks up: best brook 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.