Upper Twin Lake (Ravalli) 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 Upper Twin Lake (Ravalli)

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 Upper Twin Lake (Ravalli) on the board.

Fishing Upper Twin Lake (Ravalli): what the data says

30-acre lake in Ravalli County, Montana. The lake tops out around 26 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's the year, species by species, as the scoring engine sees it.

Drawn out, this is 30 acres of water rimmed by 0.9 miles of bank. Nearly circular (index 1.1), so the story is the bottom, not the bank. About 58% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. End to end it runs roughly 0.4 mi. You'll find it in Ravalli County. For a second option, Bitterroot River lies 32 mi northeast.

Walleye fishing at Upper Twin Lake (Ravalli)

Early season walleye use the shallows, holding in 4 to 15 ft. Expect a summer slide to 8 to 26 ft, then a winter hold in 8 to 26 ft. Put Deep basin first on the milk run — a deep basin near 25 ft that grades prime for winter. 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 (4 ft)	1/8 oz jig + minnow, Hair jig
Summer	8 to 26 ft	dusk & dawn	Break off the point (6 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	8 to 26 ft	dusk & night	Break off the point (6 ft)	Jigging rap, Jig + big minnow
Winter	8 to 26 ft	dusk & dawn	Deep basin (25 ft)	Jigging spoon + minnow head, Rattle bait

Northern Pike fishing at Upper Twin Lake (Ravalli)

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. Break off the point is the standout, a drop-off at roughly 6 ft, rated prime for fall 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	open water	#5 inline spinner, Spoon (red/white)
Summer	8 to 20 ft	dawn & dusk	Break off the point (6 ft)	Bucktail, Weedless spoon over cabbage
Fall	6 to 18 ft	midday & dawn	Break off the point (6 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	5 to 15 ft	midday	Secondary point (5 ft)	Tip-ups, Large jigging spoon

Yellow Perch fishing at Upper Twin Lake (Ravalli)

Spring yellow perch on Upper Twin Lake (Ravalli) hold shallow, usually 3 to 12 ft. They move out to 8 to 26 ft in summer and finish the year down in 8 to 26 ft. Put Deep basin first on the milk run — a deep basin near 25 ft that grades prime for fall. 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	open water	Small jig + curly tail, Perch-pattern micro crank
Summer	8 to 26 ft	dawn	Deep basin (25 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	8 to 26 ft	midday	Deep basin (25 ft)	Jigging spoon (small), Perch rig / spreader
Winter	8 to 26 ft	midday & dawn	Deep basin (25 ft)	Tungsten jig + spikes, Rattle spoon (small)

Smallmouth Bass fishing at Upper Twin Lake (Ravalli)

Spring puts smallmouth bass in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 8 to 26 ft; cold water stacks them in 8 to 26 ft. Break off the point is the standout, a drop-off at roughly 6 ft, rated prime for winter 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 (4 ft)	Ned rig, Tube jig
Summer	8 to 26 ft	dawn & dusk	Break off the point (6 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Secondary point (5 ft)	Jerkbait, Blade bait
Winter	8 to 26 ft	midday	Break off the point (6 ft)	Blade bait, Hair jig

Rainbow Trout fishing at Upper Twin Lake (Ravalli)

The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. As the season builds they drop to 7 to 26 ft, wintering in 5 to 26 ft. Top water on the chart: Break off the point, a drop-off in the 6 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	Secondary point (5 ft)	Inline spinner (silver), Small spoon
Summer	7 to 26 ft	dawn & dusk	Break off the point (6 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	7 to 26 ft	dawn & dusk	Secondary point (5 ft)	Casting spoon, Jerkbait over shoals
Winter	5 to 26 ft	dawn	Break off the point (6 ft)	Jigging spoon, Tube jig (white)

Lake Trout fishing at Upper Twin Lake (Ravalli)

Start shallow in spring: lake trout sit in 7 to 26 ft that time of year. They don't go far with the seasons — 8 to 26 ft covers summer, 7 to 26 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 25 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	7 to 26 ft	dawn & dusk	Secondary point (5 ft)	Casting spoon over shoals, Jerkbait (shallow)
Summer	8 to 26 ft	dawn	Deep basin (25 ft)	White tube jig (deep), Magnum spoon on downrigger
Fall	5 to 26 ft	dusk & dawn	Secondary point (5 ft)	Heavy casting spoon, Jigging rap over reefs
Winter	7 to 26 ft	dawn	Deep basin (25 ft)	White tube jig, Airplane jig

Upper Twin Lake (Ravalli) 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

Count 4 structure marks on this chart. The deepest, Deep basin, sits near 25 ft.

Deep basin: deep basin, around 25 ft
Break off the point: drop-off, around 6 ft
Secondary point: point, around 5 ft
Main-lake point: point, around 4 ft

Upper Twin Lake (Ravalli) 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 Upper Twin Lake (Ravalli) specifically, so confirm the current rules before you fish.

Check the official Montana fishing regulations →

Common questions

How deep is Upper Twin Lake (Ravalli)?

Upper Twin Lake (Ravalli) is about 26 ft (8 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 Upper Twin Lake (Ravalli)?

Anglers target walleye, northern pike, yellow perch, smallmouth bass, rainbow trout, lake trout, crappie, channel catfish on Upper Twin Lake (Ravalli). 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 Upper Twin Lake (Ravalli)?

Deep basin is the top-rated area: a deep basin in about 25 ft of water that rates prime for walleye in winter. The interactive chart above rates every spot for each species and season.

When is the best time to fish Upper Twin Lake (Ravalli)?

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 Upper Twin Lake (Ravalli)?

Fishing on Upper Twin Lake (Ravalli) 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

Bitterroot River 32 mi · Cedar Log Lake, South 46 mi · Cedar Log Lake, North 47 mi · Surveyor Lake 47 mi · Mussigbrod Lake 49 mi · Mystic Lake 50 mi · Siamese Lake, Lower 52 mi · Siamese Lake, Upper 52 mi · Rainbow Lake (Deer Lodge) 52 mi · Crater Lake 56 mi · Trio Lakes 57 mi · Pearl Lake 58 mi

See how Upper Twin Lake (Ravalli) stacks up: best smallmouth bass lakes in Montana · best walleye lakes in Montana · best northern pike lakes in Montana · best crappie lakes in Montana

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.