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12-acre lake in Park County, Montana. The lake tops out around 40 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.
Traced from the shoreline, Corner Lake runs 12 acres with 0.7 miles of edge. Index 1.5 on the shoreline: a few honest points and pockets, nothing labyrinthine. 53% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Tip to tip the water measures near 0.3 mi with a 0.2-mi widest point. You'll find it in Park County. For a second option, Round Lake lies 0 mi northwest.
Spring cutthroat trout on Corner 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, 30 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 (19 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (30 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (19 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (30 ft) | Small jigging spoon, Marabou jig |
Corner Lake carries 4 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 39 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 Corner Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Corner Lake is about 40 ft (12 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 Corner Lake.
Break off the point is the top-rated area: a drop-off in about 30 ft of water that rates prime for cutthroat trout in summer. Every other rated spot, per species and season, is on the map above.
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 Corner 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.
Round Lake 0 mi · Lady Of The Lake 1 mi · Long Lake (Park) 1 mi · Huckleberry Lake 2 mi · Broadwater Lake 3 mi · Aero Lake, Lower 3 mi · Goose Lake 3 mi · Zimmer Lake 3 mi · Recruitment Lake 4 mi · Anvil Lake (Park) 4 mi · Sodalite Lake 4 mi · Lone Elk Lake 4 mi
See how Corner 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.