Twin Lakes (Beaverhead) Depth Map & Fishing Spots (MT)

Hatch outlook

Grasshoppers (east-side summer)Active window

Typical here: Jul 1 – Oct 15 · until the hard frosts of mid-October; on the Missouri, August hoppers fish mid-river, not the banks

adultall day in high summer, best when afternoon wind knocks bugs onto the water

Pulls fish to the windward grassy banks and edges for months — fish the bank the wind blows ONTO.

The friendliest crossover of the summer: on lakes, drift the windward bank with a bubble-and-foam-hopper — the bubble's splash doesn't hurt a hopper presentation. On rivers, the same rig dead-drifted along the undercut grass banks, or small gold spinners under the banks between rises.

The event happens over grassy banks, undercut edges and windward shorelines

Spruce MothActive window

Typical here: Jul 20 – Aug 31 · a conifer-forest event — it needs fir and lodgepole on the banks, so it's a Rock Creek / Blackfoot / upper Bitterroot specialty

adultmorning through midday — moths don't enter the water willingly — landings are sporadic and near the conifer banks; fish the imitation LOW in the film with minimal floatant, even fully drowned, with a little movement

When the moths show, just about every run produces — large trout key on them so hard that one pattern carries the whole box for two weeks.

Honest limit: a small drowned-surface moth has no lure analog. The workable rig is a casting bubble with a drowned moth pattern along the timbered banks in the morning; otherwise fish spinners early and late and leave the moth window to the film.

2–3 weeks at best, and day-to-day — fish key on the moths when they show and vanish with them

The event happens over banks under conifers — the moths rarely reach mid-river

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours here are interpolated from real agency depth surveys (state DNR / USACE). Never use for navigation. Always check local regulations.

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Recent catches at Twin Lakes (Beaverhead)

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Fishing Twin Lakes (Beaverhead): what the data says

90-acre lake in Beaverhead County, Montana. The lake tops out around 46 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 rest of this page walks each species through its year, using the map's own scoring.

On the chart, Twin Lakes (Beaverhead) draws 90 acres inside 1.7 miles of shoreline. Its 1.2 shoreline index means few bank features; the contours below do the pattern work. Littoral water — the productive band under ~15 ft — makes up 51% of this chart. Call it 0.7 mi long by 0.3 mi wide at the broadest reach. You'll find it in Beaverhead County. For a second option, Lower Miner Lakes lies 8 mi southeast.

Walleye fishing at Twin Lakes (Beaverhead)

Early season walleye use the shallows, holding in 4 to 15 ft. Expect a summer slide to 15 to 35 ft, then a winter hold in 20 to 40 ft. Put Break off the point first on the milk run — a drop-off near 18 ft that grades prime for fall. In summer the feeding windows fall in the evening and early morning. Tie on a crawler harness on bottom bouncer or a deep crankbait (trolled) and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	4 to 15 ft	dusk & dawn	Main-lake point (5 ft)	1/8 oz jig + minnow, Hair jig
Summer	15 to 35 ft	dusk & dawn	Break off the point (18 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	12 to 40 ft	dusk & night	Break off the point (18 ft)	Jigging rap, Jig + big minnow
Winter	20 to 40 ft	dusk & dawn	Deep basin (45 ft)	Jigging spoon + minnow head, Rattle bait

Northern Pike fishing at Twin Lakes (Beaverhead)

Spring puts northern pike in skinny water — 2 to 8 ft is the zone. Warm water sends them out to 8 to 20 ft; cold water stacks them in 5 to 15 ft. Back-bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring northern pike. Plan around early morning and the evening in the warm months. A bucktail or a weedless spoon over cabbage covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Back-bay flat (3 ft)	#5 inline spinner, Spoon (red/white)
Summer	8 to 20 ft	dawn & dusk	Shallow bay flat (10 ft)	Bucktail, Weedless spoon over cabbage
Fall	6 to 18 ft	midday & dawn	Shallow bay flat (10 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	5 to 15 ft	midday	Shallow bay flat (10 ft)	Tip-ups, Large jigging spoon

Yellow Perch fishing at Twin Lakes (Beaverhead)

Spring yellow perch on Twin Lakes (Beaverhead) hold shallow, usually 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 15 to 35 ft. Put Shallow bay flat first on the milk run — a weed flat near 10 ft that grades prime for spring. The feeding windows run early morning. The summer box starts with a drop-shot micro plastics or a small spoon tipped with worm.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (10 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (18 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (18 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Break off the point (18 ft)	Tungsten jig + spikes, Rattle spoon (small)

Smallmouth Bass fishing at Twin Lakes (Beaverhead)

Spring puts smallmouth bass in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 10 to 30 ft; cold water stacks them in 20 to 45 ft. Break off the point is the standout, a drop-off at roughly 18 ft, rated prime for summer smallmouth bass. Plan around early morning and the evening in the warm months. A drop shot (goby/minnow) or a ned rig covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	Main-lake point (5 ft)	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Break off the point (18 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Break off the point (18 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (18 ft)	Blade bait, Hair jig

Rainbow Trout fishing at Twin Lakes (Beaverhead)

The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. As the season builds they drop to 8 to 30 ft, wintering in 8 to 40 ft. Top water on the chart: Break off the point, a drop-off in the 18 ft range, prime in winter. Time it for early morning and the evening. 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 (5 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	Break off the point (18 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Break off the point (18 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Break off the point (18 ft)	Jigging spoon, Tube jig (white)

Lake Trout fishing at Twin Lakes (Beaverhead)

Start shallow in spring: lake trout sit in 10 to 40 ft that time of year. Warm water sends them out to 14 to 46 ft; cold water stacks them in 12 to 46 ft. Top water on the chart: Deep basin, a deep basin in the 45 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a white tube jig (deep) or a magnum spoon on downrigger until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	10 to 40 ft	dawn & dusk	Break off the point (18 ft)	Casting spoon over shoals, Jerkbait (shallow)
Summer	14 to 46 ft	dawn	Deep basin (45 ft)	White tube jig (deep), Magnum spoon on downrigger
Fall	9 to 46 ft	dusk & dawn	Secondary point (6 ft)	Heavy casting spoon, Jigging rap over reefs
Winter	12 to 46 ft	dawn	Deep basin (45 ft)	White tube jig, Airplane jig

Twin Lakes (Beaverhead) also holds crappie (10 to 25 ft in summer), channel catfish (8 to 25 ft in summer). Pick any of them on the map above for rated spots and bait picks.

Notable structure

Twin Lakes (Beaverhead) carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 45 ft down.

Deep basin: deep basin, around 45 ft
Break off the point: drop-off, around 18 ft
Shallow bay flat: weed flat, around 10 ft
Secondary point: point, around 6 ft
Main-lake point: point, around 5 ft
Back-bay flat: weed flat, around 3 ft

Twin Lakes (Beaverhead) fishing regulations

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 Twin Lakes (Beaverhead) specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Twin Lakes (Beaverhead)?

Twin Lakes (Beaverhead) is about 46 ft (14 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.

What fish are in Twin Lakes (Beaverhead)?

Anglers target walleye, northern pike, yellow perch, smallmouth bass, rainbow trout, lake trout, crappie, channel catfish on Twin Lakes (Beaverhead). This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.

Where is the best fishing spot on Twin Lakes (Beaverhead)?

Break off the point is the top-rated area: a drop-off in about 18 ft of water that rates prime for walleye in fall. Every other rated spot, per species and season, is on the map above.

When is the best time to fish Twin Lakes (Beaverhead)?

For walleye, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.

What are the fishing regulations for Twin Lakes (Beaverhead)?

Fishing on Twin Lakes (Beaverhead) 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.

Nearby waters

Lower Miner Lakes 8 mi · Van Houten Lake 16 mi · Bear Lake (Beaverhead) 23 mi · Reservoir Lake 23 mi · Lily Lake (Beaverhead) 23 mi · Baldy Lake 24 mi · Sand Lake 25 mi · Mussigbrod Lake 27 mi · Sawtooth Lake 32 mi · Mystic Lake 32 mi · Minneopa Lake 35 mi · Tendoy Lake 36 mi

See how Twin Lakes (Beaverhead) stacks up: best smallmouth bass lakes in Montana · best walleye lakes in Montana · best northern pike lakes in Montana · best crappie lakes in Montana

More water nearby: Beaverhead County fishing maps (24 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.