Mcgregor 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 Mcgregor 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 Mcgregor Lake on the board.

Fishing Mcgregor Lake: what the data says

1,500-acre lake near Marion. The lake tops out around 220 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 the data behind the map says about each species, season by season:

Mcgregor Lake maps at 1,529 acres behind 10.8 miles of shoreline. With a 2 development index there's bank structure worth casting at, in moderation. Roughly 3% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 4.3 mi, about 1.6 mi across. It sits in Flathead County. If the bite dies, Thompson Lake, Lower is 8 mi to the west.

Brook Trout fishing at Mcgregor Lake

Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 3 to 20 ft. Put Break off the point first on the milk run — a drop-off near 33 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Shallow bay flat (14 ft)	Small inline spinner (gold), Tiny spoon
Summer	10 to 30 ft	dawn & dusk	Break off the point (33 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	open water	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Shallow bay flat (14 ft)	Small jigging spoon, Tungsten jig + plastic

Lake Trout fishing at Mcgregor Lake

When the water first warms, lake trout slide up into 10 to 40 ft. By summer they slide out to 50 to 120 ft, and by winter most fish are in 20 to 80 ft. If you only fish one area, make it Secondary point: a point around 21 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a white tube jig (deep) or a magnum spoon on downrigger rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	10 to 40 ft	dawn & dusk	Secondary point (21 ft)	Casting spoon over shoals, Jerkbait (shallow)
Summer	50 to 120 ft	dawn	Break off the point (33 ft)	White tube jig (deep), Magnum spoon on downrigger
Fall	10 to 50 ft	dusk & dawn	Main-lake point (44 ft)	Heavy casting spoon, Jigging rap over reefs
Winter	20 to 80 ft	dawn	Break off the point (33 ft)	White tube jig, Airplane jig

Kokanee fishing at Mcgregor Lake

Early season kokanee use the shallows, holding in 10 to 30 ft. Expect a summer slide to 30 to 70 ft, then a winter hold in 20 to 80 ft. Put Break off the point first on the milk run — a drop-off near 33 ft that grades prime for summer. In summer the feeding windows fall in early morning. Tie on a dodger + pink/orange squid on downrigger or a kokanee bug + corn and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	10 to 30 ft	dawn	Break off the point (33 ft)	Small dodger + squid (pink), Wedding-ring spinner + corn
Summer	30 to 70 ft	dawn	Break off the point (33 ft)	Dodger + pink/orange squid on downrigger, Kokanee bug + corn
Fall	5 to 40 ft	dawn	Break off the point (33 ft)	Dodger + squid (deeper red/purple), Small spoon
Winter	20 to 80 ft	dawn	Break off the point (33 ft)	Small glow jig + corn or maggot, Tiny spoon

Lake Whitefish fishing at Mcgregor Lake

Start shallow in spring: lake whitefish sit in 15 to 45 ft that time of year. Summer pushes them deeper, 40 to 90 ft, and winter fish settle into 25 to 70 ft. The spot to know is Break off the point, a drop-off in about 33 ft of water that rates prime for lake whitefish in spring. Warm-month bites cluster around early morning. Throw a blade bait vertical or a small jigging spoon until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	15 to 45 ft	midday & dawn	Break off the point (33 ft)	Small jig + waxworm, Blade bait (small)
Summer	40 to 90 ft	dawn	Break off the point (33 ft)	Blade bait vertical, Small jigging spoon
Fall	8 to 30 ft	dusk	Secondary point (21 ft)	Small spoon (gold), Jig + plastic larva
Winter	25 to 70 ft	midday & dawn	Break off the point (33 ft)	Jigging spoon + bead chain, Tungsten jig + waxie

Yellow Perch fishing at Mcgregor Lake

The spring pattern is a shallow one: yellow perch in 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 15 to 35 ft for winter. The spot to know is Break off the point, a drop-off in about 33 ft of water that rates prime for yellow perch in fall. Plan around early morning in the warm months. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (14 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (33 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (33 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Break off the point (33 ft)	Tungsten jig + spikes, Rattle spoon (small)

Rainbow Trout fishing at Mcgregor Lake

Spring rainbow trout on Mcgregor Lake hold shallow, usually 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. The chart's best answer is Break off the point — drop-off, 33 ft, prime for winter. Prime time lands in early morning and the evening. The summer box starts with a dodger + spoon (deep troll) or a flutter spoon.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Secondary point (21 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	Break off the point (33 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Secondary point (21 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Break off the point (33 ft)	Jigging spoon, Tube jig (white)

Mcgregor Lake also holds smallmouth bass (10 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.

Notable structure

Count 8 structure marks on this chart. The deepest, Deep basin, sits near 220 ft.

Deep basin: deep basin, around 220 ft
Main-lake point: point, around 44 ft
Break off the point: drop-off, around 33 ft
Back-bay flat: feeding flat, around 23 ft
Secondary point: point, around 21 ft
Dock / pier line: dock line, around 15 ft
Shallow bay flat: feeding flat, around 14 ft
Feeding flat: feeding flat, around 14 ft

Public access & boat ramps

Boat launch — ramp

Access data: OpenStreetMap contributors (ODbL) — community-mapped launches. Confirm conditions and fees locally before you launch.

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

Check the official Montana fishing regulations →

Common questions

How deep is Mcgregor Lake?

Mcgregor Lake is about 220 ft (67 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 Mcgregor Lake?

Anglers target brook trout, lake trout, kokanee, lake whitefish, yellow perch, rainbow trout, smallmouth bass on Mcgregor Lake.

Where is the best fishing spot on Mcgregor Lake?

Break off the point is the top-rated area: a drop-off in about 33 ft of water that rates prime for yellow perch in fall. The map above holds the full rated-spot list for every species and season.

When is the best time to fish Mcgregor Lake?

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 Mcgregor Lake?

Fishing on Mcgregor 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

Thompson Lake, Lower 8 mi · Hubbart Reservoir 8 mi · Little Bitterroot Lake 9 mi · Thompson Lake, Middle 10 mi · Rogers Lake 12 mi · Thompson Lake, Upper 12 mi · Crystal Lake (Lincoln) 14 mi · Horseshoe Lake (Lincoln) 15 mi · Leon Lake 15 mi · Island Lake 16 mi · Ashley Lake 16 mi · Little Loon Lake 16 mi

See how Mcgregor Lake stacks up: best smallmouth bass lakes in Montana · best rainbow trout lakes in Montana · best yellow perch lakes in Montana · best lake trout lakes in Montana

More water nearby: Flathead County fishing maps (55 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.