Foy 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.

Loading depth chart…

Recent catches at Foy 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 Foy Lake on the board.

Fishing Foy Lake: what the data says

254-acre lake in Flathead County, Montana. The lake tops out around 120 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. Species by species, here's what the data says the year looks like.

Kokanee fishing at Foy Lake

Early season kokanee use the shallows, holding in 10 to 30 ft. Summer is a 30 to 70 ft game here, winter a 20 to 80 ft one. The chart's best answer is Break off the point — drop-off, 80 ft, good for winter. Best bite is 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	Deep basin (120 ft)	Small dodger + squid (pink), Wedding-ring spinner + corn
Summer	30 to 70 ft	dawn	Deep basin (120 ft)	Dodger + pink/orange squid on downrigger, Kokanee bug + corn
Fall	5 to 40 ft	dawn	open water	Dodger + squid (deeper red/purple), Small spoon
Winter	20 to 80 ft	dawn	Break off the point (80 ft)	Small glow jig + corn or maggot, Tiny spoon

Arctic Grayling fishing at Foy Lake

Early season arctic grayling use the shallows, holding in 2 to 10 ft. Summer is a 3 to 15 ft game here, winter an 8 to 25 ft one. The chart's best answer is Shallow bay flat — feeding flat, 1 ft, prime for summer. Best bite is the evening and early morning. Tie on a dry fly (parachute adams, elk hair caddis) or a small inline spinner and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	midday & dusk	Shallow bay flat (1 ft)	1/16 oz spinner (silver), Small dry fly (Adams, Griffith's)
Summer	3 to 15 ft	dusk & dawn	Shallow bay flat (1 ft)	Dry fly (parachute Adams, elk hair caddis), Small inline spinner
Fall	6 to 20 ft	midday	Break off the point (80 ft)	Small spoon, Beadhead nymph under indicator
Winter	8 to 25 ft	midday & dawn	Deep basin (120 ft)	Tungsten jig + waxworm, Small jigging spoon (gold)

Largemouth Bass fishing at Foy Lake

Come spring, look for largemouth bass tight to the bank in 2 to 10 ft. Expect a summer slide to 8 to 20 ft, then a winter hold in 15 to 35 ft. Start at Dock / pier line. It's a dock line holding about 4 ft of water and rates prime come spring. Prime time lands in early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait is the honest summer answer here.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	dawn & dusk	Dock / pier line (4 ft)	Spinnerbait, Chatterbait
Summer	8 to 20 ft	dawn & dusk	Break off the point (80 ft)	Texas-rigged 10" worm, Deep-diving crankbait
Fall	4 to 15 ft	midday & dawn	Main-lake point (1 ft)	Squarebill crankbait (shad), Spinnerbait
Winter	15 to 35 ft	midday	Break off the point (80 ft)	Blade bait, Jigging spoon

Yellow Perch fishing at Foy Lake

The spring pattern is a shallow one: yellow perch in 3 to 12 ft. As the season builds they drop to 10 to 30 ft, wintering in 15 to 35 ft. Top water on the chart: Shallow bay flat, a feeding flat in the 1 ft range, prime in spring. Time it for early morning. 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 (1 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Deep basin (120 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Deep basin (120 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Deep basin (120 ft)	Tungsten jig + spikes, Rattle spoon (small)

Rainbow Trout fishing at Foy Lake

Spring rainbow trout on Foy Lake hold shallow, usually 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. Put Main-lake point first on the milk run — a point near 1 ft that grades good for spring. The feeding windows run 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	Main-lake point (1 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	open water	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Main-lake point (1 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Break off the point (80 ft)	Jigging spoon, Tube jig (white)

Notable structure

The chart marks 7 structure features on Foy Lake; the deepest is Deep basin at about 120 ft.

Deep basin: deep basin, around 120 ft
Break off the point: drop-off, around 80 ft
Dock / pier line: dock line, around 4 ft
Main-lake point: point, around 1 ft
Secondary point: point, around 1 ft
Shallow bay flat: feeding flat, around 1 ft
Back-bay flat: feeding flat, around 1 ft

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

Check the official Montana fishing regulations →

Common questions

How deep is Foy Lake?

Foy Lake is about 120 ft (37 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 Foy Lake?

Anglers target kokanee, arctic grayling, largemouth bass, yellow perch, rainbow trout on Foy Lake.

Where is the best fishing spot on Foy Lake?

Dock / pier line is the top-rated area: a dock line in about 4 ft of water that rates prime for largemouth bass in spring. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Foy Lake?

For kokanee, the summer bite is best in 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 Foy Lake?

Fishing on Foy 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

Half Moon Slough 6 mi · Lake Blaine 12 mi · Ashley Lake 13 mi · Cabin Lake 13 mi · Rogers Lake 13 mi · Peterson Lake 14 mi · Mccaffery Lake 14 mi · Abbot Lake 15 mi · Echo Lake (Flathead) 15 mi · Blanchard Lake 15 mi · Spencer Lake 16 mi · Lake Mary Ronan 17 mi

See how Foy Lake stacks up: best largemouth bass lakes in Montana · best rainbow trout lakes in Montana · best yellow perch lakes in Montana · best kokanee 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.