Loon Lake (Lake) 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 Loon Lake (Lake)

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 Loon Lake (Lake) on the board.

Fishing Loon Lake (Lake): what the data says

58-acre lake in Lake County, Montana. The lake tops out around 52 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. What follows comes from the same scoring engine that paints the spots above.

Loon Lake (Lake) maps at 51 acres behind 1.3 miles of shoreline. The basin is a simple one (shoreline index 1.3) — close to a bowl, so the structure on the chart matters more than the bank. About 13% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Tip to tip the water measures near 0.4 mi with a 0.4-mi widest point. It sits in Lake County. Its nearest charted neighbour, Horseshoe Lake (Lake), is 0 mi to the south.

Crappie fishing at Loon Lake (Lake)

Early season crappie use the shallows, holding in 2 to 8 ft. Summer is a 10 to 25 ft game here, winter a 15 to 35 ft one. The chart's best answer is Shallow bay flat — feeding flat, 12 ft, prime for summer. Best bite is early morning and the evening. Tie on a jig trolled/spider-rigged or a small crankbait (trolled) and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Back-bay flat (9 ft)	1/16 oz jig + tube, Curly-tail grub
Summer	10 to 25 ft	dawn & dusk	Shallow bay flat (12 ft)	Jig trolled/spider-rigged, Small crankbait (trolled)
Fall	8 to 20 ft	dawn	Shallow bay flat (12 ft)	Jig + minnow combo, Small swimbait (1.5-2")
Winter	15 to 35 ft	midday	Break off the point (32 ft)	Tungsten jig + soft plastic, Tiny jigging spoon

Yellow Perch fishing at Loon Lake (Lake)

In spring, yellow perch run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 15 to 35 ft for winter. Fall yellow perch concentrate at Break off the point, a prime-rated drop-off around 32 ft. Fish it in early morning and you'll meet the bite. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (12 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (32 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (32 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Break off the point (32 ft)	Tungsten jig + spikes, Rattle spoon (small)

Largemouth Bass fishing at Loon Lake (Lake)

Spring largemouth bass on Loon Lake (Lake) hold shallow, usually 2 to 10 ft. They move out to 8 to 20 ft in summer and finish the year down in 15 to 35 ft. Put Main-lake point first on the milk run — a point near 15 ft that grades prime for fall. The feeding windows run early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	dawn & dusk	Back-bay flat (9 ft)	Spinnerbait, Chatterbait
Summer	8 to 20 ft	dawn & dusk	Main-lake point (15 ft)	Texas-rigged 10" worm, Deep-diving crankbait
Fall	4 to 15 ft	midday & dawn	Main-lake point (15 ft)	Squarebill crankbait (shad), Spinnerbait
Winter	15 to 35 ft	midday	Break off the point (32 ft)	Blade bait, Jigging spoon

Rainbow Trout fishing at Loon Lake (Lake)

When the water first warms, rainbow trout slide up into 5 to 20 ft. By summer they slide out to 8 to 30 ft, and by winter most fish are in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 32 ft that scores prime in winter. In summer the feeding windows fall in early morning and the evening. Keep a dodger + spoon (deep troll) or a flutter spoon rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Main-lake point (15 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	Break off the point (32 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Main-lake point (15 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Break off the point (32 ft)	Jigging spoon, Tube jig (white)

Smallmouth Bass fishing at Loon Lake (Lake)

Early season smallmouth bass use the shallows, holding in 3 to 12 ft. Summer is a 10 to 30 ft game here, winter a 20 to 45 ft one. The chart's best answer is Main-lake point — point, 15 ft, prime for fall. Best bite is early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	Main-lake point (15 ft)	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Main-lake point (15 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Main-lake point (15 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (32 ft)	Blade bait, Hair jig

Notable structure

5 pieces of structure are mapped here — Deep basin, around 52 ft, is the deepest of them.

Deep basin: deep basin, around 52 ft
Break off the point: drop-off, around 32 ft
Main-lake point: point, around 15 ft
Shallow bay flat: feeding flat, around 12 ft
Back-bay flat: feeding flat, around 9 ft

Public access & boat ramps

Loon Lake/Ferndale — ramp (gravel)

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

Loon Lake (Lake) 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 Loon Lake (Lake) specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Loon Lake (Lake)?

Loon Lake (Lake) is about 52 ft (16 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 Loon Lake (Lake)?

Anglers target crappie, yellow perch, largemouth bass, rainbow trout, smallmouth bass on Loon Lake (Lake).

Where is the best fishing spot on Loon Lake (Lake)?

Main-lake point is the top-rated area: a point in about 15 ft of water that rates prime for largemouth bass in fall. The map above holds the full rated-spot list for every species and season.

When is the best time to fish Loon Lake (Lake)?

For crappie, 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 Loon Lake (Lake)?

Fishing on Loon Lake (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.

Nearby waters

Horseshoe Lake (Lake) 0 mi · Swan Lake 5 mi · Mccaffery Lake 7 mi · Abbot Lake 7 mi · Echo Lake (Flathead) 8 mi · Peterson Lake 8 mi · Big Hawk Lake 8 mi · Pilgrim Lake 8 mi · North Biglow Lake 8 mi · Birch Lake 9 mi · Margaret Lake (Flathead) 10 mi · Black Lake 10 mi

See how Loon Lake (Lake) stacks up: best largemouth bass lakes in Montana · best smallmouth bass lakes in Montana · best crappie lakes in Montana · best rainbow trout lakes in Montana

More water nearby: Lake County fishing maps (12 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.