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53-acre lake in Carbon County, Montana. The lake tops out around 120 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. Below is the species-by-species picture, pulled from the same data the map uses.
Traced from the shoreline, Green Lake (Carbon) runs 53 acres with 1.5 miles of edge. The shoreline is moderately structured (index 1.5) — enough points and pockets to pattern. 19% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 0.4 mi end to end and 0.3 mi across at its widest. The water lies in Carbon County. The nearest mapped water is Estelle Lake (Carbon), 1 mi to the southwest.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. Spring brook trout concentrate at Main-lake point, a prime-rated point around 11 ft. Fish it in early morning and the evening and you'll meet the bite. 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 (11 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (11 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (5 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 120 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 Green Lake (Carbon) specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Green Lake (Carbon) is about 120 ft (37 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 Green Lake (Carbon).
Main-lake point is the top-rated area: a point in about 11 ft of water that rates prime for brook trout in spring. 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 Green Lake (Carbon) 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.
Estelle Lake (Carbon) 1 mi · Lake Elaine (Carbon) 1 mi · Castle Lake 1 mi · Burnt Bacon Lake 1 mi · Crystal Lake (Carbon) 2 mi · Erratic Lake (Carbon) 2 mi · North Hidden Lake 2 mi · Thiel Lake 2 mi · Till Lake 2 mi · Farley Lake (Carbon) 2 mi · Cloverleaf Lake #215 2 mi · Cloverleaf Lake #216 2 mi
See how Green Lake (Carbon) stacks up: best brook trout lakes in Montana
More water nearby: Carbon County fishing maps (65 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.