Lake Helena 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 Lake Helena

Shared by DepthScout anglers. Exact spots stay private, always.

No shared catches here yet — be the first.Log a catch from the map above and share it to put Lake Helena on the board.

Fishing Lake Helena: what the data says

1,890-acre lake in Lewis and Clark 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. Here is how the season plays out for each species, straight from the data behind the map.

Drawn out, this is 1,890 acres of water rimmed by 6.9 miles of bank. The basin is a simple one (shoreline index 1.1) — close to a bowl, so the structure on the chart matters more than the bank. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. Call it 2.7 mi long by 1.5 mi wide at the broadest reach. You'll find it in Lewis and Clark County. The nearest mapped water is Hauser Lake, 6 mi to the east.

Brook Trout fishing at Lake Helena

The spring pattern is a shallow one: brook trout in 2 to 12 ft. The depth story barely changes: 4 to 12 ft through summer, 2 to 12 ft in winter. Top water on the chart: Deep basin, a deep basin in the 8 ft range, prime in summer. Time it for early morning and the evening. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 12 ft	dawn & dusk	Break off the point (8 ft)	Small inline spinner (gold), Tiny spoon
Summer	4 to 12 ft	dawn & dusk	Deep basin (8 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 12 ft	midday & dawn	Main-lake point (1 ft)	Small spoon (orange), Spinner
Winter	2 to 12 ft	dawn	Deep basin (8 ft)	Small jigging spoon, Tungsten jig + plastic

Walleye fishing at Lake Helena

Spring walleye on Lake Helena hold shallow, usually 3 to 12 ft. Depth-wise the year is flat: 4 to 12 ft in summer, 4 to 12 ft once it turns cold. The chart's best answer is Break off the point — drop-off, 8 ft, prime for fall. Prime time lands in the evening and early morning. The summer box starts with a crawler harness on bottom bouncer or a deep crankbait (trolled).

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dusk & dawn	Break off the point (8 ft)	1/8 oz jig + minnow, Hair jig
Summer	4 to 12 ft	dusk & dawn	Break off the point (8 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	4 to 12 ft	dusk & night	Break off the point (8 ft)	Jigging rap, Jig + big minnow
Winter	4 to 12 ft	dusk & dawn	Deep basin (8 ft)	Jigging spoon + minnow head, Rattle bait

Common Carp fishing at Lake Helena

Start shallow in spring: common carp sit in 2 to 10 ft that time of year. Summer pushes them deeper, 2 to 12 ft, and winter fish settle into 4 to 12 ft. The spot to know is Deep basin, a deep basin in about 8 ft of water that rates prime for common carp in winter. Warm-month bites cluster around early morning and the evening.

Season	Depth	Best window	Start at
Spring	2 to 10 ft	midday & dawn	Shallow bay flat (1 ft)
Summer	2 to 12 ft	dawn & dusk	Shallow bay flat (1 ft)
Fall	3 to 12 ft	midday	Deep basin (8 ft)
Winter	4 to 12 ft	midday	Deep basin (8 ft)

Northern Pike fishing at Lake Helena

In spring, northern pike run shallow here, mostly 2 to 8 ft. Midsummer fish sit out in 4 to 12 ft before dropping to 4 to 12 ft for winter. Fall northern pike concentrate at Break off the point, a prime-rated drop-off around 8 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a bucktail or a weedless spoon over cabbage most summer days.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Shallow bay flat (1 ft)	#5 inline spinner, Spoon (red/white)
Summer	4 to 12 ft	dawn & dusk	Break off the point (8 ft)	Bucktail, Weedless spoon over cabbage
Fall	4 to 12 ft	midday & dawn	Break off the point (8 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	4 to 12 ft	midday	Shallow bay flat (1 ft)	Tip-ups, Large jigging spoon

Yellow Perch fishing at Lake Helena

Early season yellow perch use the shallows, holding in 3 to 12 ft. Even in summer they hold at 4 to 12 ft; winter keeps them in 4 to 12 ft. The chart's best answer is Deep basin — deep basin, 8 ft, prime for fall. Best bite is early morning. Tie on a drop-shot micro plastics or a small spoon tipped with worm and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (1 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	4 to 12 ft	dawn	Deep basin (8 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	4 to 12 ft	midday	Deep basin (8 ft)	Jigging spoon (small), Perch rig / spreader
Winter	4 to 12 ft	midday & dawn	Deep basin (8 ft)	Tungsten jig + spikes, Rattle spoon (small)

Brown Trout fishing at Lake Helena

Spring brown trout on Lake Helena hold shallow, usually 1 to 12 ft. Depth-wise the year is flat: 4 to 12 ft in summer, 2 to 12 ft once it turns cold. The chart's best answer is Break off the point — drop-off, 8 ft, prime for summer. Prime time lands in after dark and early morning. The summer box starts with a spoon at the thermocline or a deep stickbait (night).

Season	Depth	Best window	Start at	Go-to baits
Spring	1 to 12 ft	dawn & dusk	Main-lake point (1 ft)	Stickbait off planer boards (shallow), Small spoon along mud lines
Summer	4 to 12 ft	night & dawn	Break off the point (8 ft)	Spoon at the thermocline, Deep stickbait (night)
Fall	2 to 12 ft	dusk & dawn	Main-lake point (1 ft)	Jerkbait over gravel, Casting spoon
Winter	2 to 12 ft	dawn	Break off the point (8 ft)	Jigging spoon, Small stickbait (slow)

Lake Helena also holds cutthroat trout (3 to 12 ft in summer), rainbow trout (3 to 12 ft in summer). Pick any of them on the map above for rated spots and bait picks.

Notable structure

Count 6 structure marks on this chart. The deepest, Deep basin, sits near 8 ft.

Deep basin: deep basin, around 8 ft
Break off the point: drop-off, around 8 ft
Main-lake point: point, around 1 ft
Secondary point: point, around 1 ft
Shallow bay flat: weed flat, around 1 ft
Back-bay flat: weed flat, around 1 ft

Public access & boat ramps

Causeway
Lake Helena

Access data: Montana FWP — Fishing Access Sites. Confirm conditions and fees locally before you launch.

Lake Helena 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 Lake Helena specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Lake Helena?

Lake Helena 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.

What fish are in Lake Helena?

Anglers target brook trout, walleye, common carp, northern pike, yellow perch, brown trout, cutthroat trout, rainbow trout on Lake Helena.

Where is the best fishing spot on Lake Helena?

Break off the point is the top-rated area: a drop-off in about 8 ft of water that rates prime for walleye in fall. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Lake Helena?

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.

What are the fishing regulations for Lake Helena?

Fishing on Lake Helena 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

Hauser Lake 6 mi · Spring Meadow Lake 9 mi · Canyon Ferry Reservoir 20 mi · Hound Creek Reservoir 24 mi · Missouri River 33 mi · Gollaher Reservoir 39 mi · Nevada Reservoir 42 mi · Heart Lake (Lewis and Clark) 46 mi · Newlan Reservoir 48 mi · Bean Lake 48 mi · Parker Lake 50 mi · Coopers Lake 54 mi

See how Lake Helena stacks up: best walleye lakes in Montana · best northern pike lakes in Montana · best rainbow trout lakes in Montana · best yellow perch lakes in Montana

More water nearby: Lewis and Clark County fishing maps (9 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.