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25-acre reservoir in Blaine County, Montana. The lake tops out around 12 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.
Drawn out, this is 25 acres of water rimmed by 0.9 miles of bank. Nearly circular (index 1.2), so the story is the bottom, not the bank. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. Tip to tip the water measures near 0.4 mi with a 0.2-mi widest point. You'll find it in Blaine County. The nearest mapped water is Anita Reservoir, 1 mi to the southwest.
In spring, rainbow trout run shallow here, mostly 3 to 12 ft. Summer keeps them at 3 to 12 ft, and they winter in 2 to 12 ft. Break off the point is the standout, a drop-off at roughly 4 ft, rated prime for winter rainbow trout. Time it for early morning and the evening. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Secondary point (6 ft) | Inline spinner (silver), Small spoon |
| Summer | 3 to 12 ft | dawn & dusk | Break off the point (4 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 3 to 12 ft | dawn & dusk | Secondary point (6 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 2 to 12 ft | dawn | Break off the point (4 ft) | Jigging spoon, Tube jig (white) |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 11 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 BR0045 Reservoir specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
BR0045 Reservoir is about 12 ft (4 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 BR0045 Reservoir.
Break off the point is the top-rated area: a drop-off in about 4 ft of water that rates prime for rainbow trout in winter. The map above holds the full rated-spot list for every 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 BR0045 Reservoir 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.
Anita Reservoir 1 mi · Cypress Lake 38 mi, SK · Blacker Lake 50 mi, SK · Bailey Reservoir 50 mi · Loch Leven Lake 51 mi, SK · Harris Reservoir 61 mi, SK · Elkwater Lake 69 mi, AB · Junction Reservoir 71 mi, SK · Reid Lake 91 mi, SK · Gouverneur Reservoir 92 mi, SK · Current Reservoir 94 mi · Lac Pelletier 94 mi, SK
See how BR0045 Reservoir stacks up: best rainbow trout lakes in Montana
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.