Lily Lake (Beaverhead) 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 Lily Lake (Beaverhead)

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

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Fishing Lily Lake (Beaverhead): what the data says

15-acre lake in Beaverhead County, Montana. The lake tops out around 33 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. The season-by-season read for each species follows, from the map's own numbers.

The drawn water covers 14 acres wrapped in 0.7 miles of bank. The basin is a simple one (shoreline index 1.4) — close to a bowl, so the structure on the chart matters more than the bank. Littoral water — the productive band under ~15 ft — makes up 21% of this chart. End to end it runs roughly 0.3 mi. Beaverhead County claims this one. Sand Lake sits 2 mi east — the closest neighbouring chart.

Rainbow Trout fishing at Lily Lake (Beaverhead)

Early season rainbow trout use the shallows, holding in 5 to 20 ft. Summer is an 8 to 30 ft game here, winter a 7 to 33 ft one. The chart's best answer is Break off the point — drop-off, 33 ft, prime for winter. Best bite is early morning and the evening. Tie on a dodger + spoon (deep troll) or a flutter spoon and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Main-lake point (20 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	9 to 33 ft	dawn & dusk	Main-lake point (20 ft)	Casting spoon, Jerkbait over shoals
Winter	7 to 33 ft	dawn	Break off the point (33 ft)	Jigging spoon, Tube jig (white)

Notable structure

Count 3 structure marks on this chart. The deepest, Deep basin, sits near 33 ft.

Deep basin: deep basin, around 33 ft
Break off the point: drop-off, around 33 ft
Main-lake point: point, around 20 ft

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

Check the official Montana fishing regulations →

Common questions

How deep is Lily Lake (Beaverhead)?

Lily Lake (Beaverhead) is about 33 ft (10 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 Lily Lake (Beaverhead)?

Anglers target rainbow trout on Lily Lake (Beaverhead).

Where is the best fishing spot on Lily Lake (Beaverhead)?

Break off the point is the top-rated area: a drop-off in about 33 ft of water that rates prime for rainbow trout in winter. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Lily Lake (Beaverhead)?

For rainbow 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 Lily Lake (Beaverhead)?

Fishing on Lily Lake (Beaverhead) 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

Sand Lake 2 mi · Baldy Lake 3 mi · Bear Lake (Beaverhead) 9 mi · Mussigbrod Lake 18 mi · Tendoy Lake 19 mi · Sawtooth Lake 20 mi · Mystic Lake 20 mi · Twin Lakes (Beaverhead) 23 mi · Rainbow Lake (Beaverhead) 23 mi · Rainbow Lake (Deer Lodge) 24 mi · Minneopa Lake 24 mi · Deerhead Lake 24 mi

See how Lily Lake (Beaverhead) stacks up: best rainbow trout lakes in Montana

More water nearby: Beaverhead County fishing maps (24 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.