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12-acre lake in Carbon County, Montana. The lake tops out around 25 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.
Drawn out, this is 13 acres of water rimmed by 0.8 miles of bank. Index 1.7 on the shoreline: a few honest points and pockets, nothing labyrinthine. 74% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. End to end it runs roughly 0.4 mi. The water lies in Carbon County. The nearest mapped water is Rainbow Lake (Carbon), 1 mi to the south.
The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. Midsummer fish sit out in 7 to 25 ft before dropping to 5 to 25 ft for winter. The spot to know is Break off the point, a drop-off in about 11 ft of water that rates prime for rainbow trout in winter. Plan around early morning and the evening in the warm months. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (7 ft) | Inline spinner (silver), Small spoon |
| Summer | 7 to 25 ft | dawn & dusk | Break off the point (11 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 25 ft | dawn & dusk | Main-lake point (7 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 25 ft | dawn | Break off the point (11 ft) | Jigging spoon, Tube jig (white) |
Structure-wise the chart holds 4 features, led in depth by Deep basin at roughly 24 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 Rimrock Lake specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Rimrock Lake is about 25 ft (8 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 rainbow trout on Rimrock Lake.
Break off the point is the top-rated area: a drop-off in about 11 ft of water that rates prime for rainbow trout in winter. Open the map above to see every rated spot for each species and season.
For rainbow 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 Rimrock 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.
Rainbow Lake (Carbon) 1 mi · Lake At Falls 2 mi · Martin Lake (Carbon) 2 mi · Summit Lake (Carbon) 3 mi · Arch Lake 3 mi · Echo Lake (Carbon) 3 mi · Vogel Lake 3 mi · Froze To Death Lake (Stillwater) 4 mi · Bergschrund Lake 4 mi · Phantom Lake 4 mi · East Rosebud Lake 4 mi · Dewey Lake 4 mi
See how Rimrock Lake stacks up: best rainbow 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.