Lake Koeneman Depth Map & Fishing Spots (WA)

Hatch outlook

Callibaetis (Speckled Dun)Active window

Typical here: Aug 15 – Sep 15 · the smaller fall brood

nymphthe hours before the midday emergence — nymphs rise off the weed tops in a vertical zigzag that can take hours — sources split between slow 2–4 inch strips with long pauses and a quicker steady retrieve; carry both speeds
dunmidday, roughly 11am into early afternoon
spinnermid-to-late-morning falls

Trout browse the weed-bed edges knocking nymphs loose, then cruise the flats sipping duns at midday — the marquee western lake mayfly.

The midday emergence puts cruisers over weed flats in under 20 ft: a casting bubble with a #14 Callibaetis nymph retrieved dead-slow with pauses is the honest match. Between hatch hours, small spoons and #1 inline spinners along the weed edges and drop-offs pick off the same fish.

The event happens over weed flats and weed-bed edges in 20 ft of water or less

Chironomids (stillwater midges)Active window

Typical here: May 1 – Oct 31

nymphearly morning, start of the day — fish the bloodworm ON the bottom — 4–6 inches off the mud before the emergence starts
pupathe cool morning hours are prime — as the emergence builds, slide the pupa up to 12–15 inches off bottom under the indicator; a little wind chop does the jigging

Concentrates by DEPTH BAND and mud type, not a fixed spot: roughly 20–25 ft in spring, deeper midsummer, in against the feeder creeks in summer heat, 5–25 ft in fall. Match the band.

This one translates almost perfectly: a slip float with a 1/64–1/100 oz midge-pattern jig set 4–15 inches off bottom over a mud flat, dead-sticked with the chop doing the work. Depth control is everything — no moving lure imitates a hanging pupa; the float rig IS the technique.

The event happens over open mud flats alongside weedlines, channels and basin edges; feeder-creek mouths in summer heat

Water boatman fall flightsActive window

Typical here: Aug 25 – Oct 10 · peaks on crisp, bright fall days after the first cold snap

adultmiddday-ish on calm, sunny fall days — the fishable moment is the splashdown: boatmen dive in headfirst trailing an air bubble and make repeated trips back to the surface — a fly or lure that dives nose-first on the drop imitates exactly this

Takes are seldom subtle — trout ravage boatmen as they hit the water and during their subsurface runs.

Tailor-made for hardware: a small 1/16 oz silver-bellied spoon or jig cast AT the rings of a splashdown sinks headfirst exactly like the natural — twitch-pause it back through the top few feet. On flight days fan-cast the shallow weed margins.

The event happens over near-shore shallows, weed beds and shoal margins on calm sunny fall afternoons

Grasshoppers (east-side summer)Active window

Typical here: Jun 15 – Sep 30

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

Next on this water

Damselfly migration · forageMay 15 – Jul 31 · in ~9 months

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours on this water are approximations. Never use for navigation. Always check local regulations.

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Recent catches at Lake Koeneman

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

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Fishing Lake Koeneman: what the data says

19-acre lake in Washington. The lake tops out around 24 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. Here is how the season plays out for each species, straight from the data behind the map.

On the chart, Lake Koeneman draws 19 acres inside 0.7 miles of shoreline. The basin is a simple one (shoreline index 1.1) — close to a bowl, so the structure on the chart matters more than the bank. The shallow band under 15 ft claims about 34% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 0.3 mi with a 0.2-mi widest point. The nearest mapped water is Carney Lake, 1 mi to the east.

Rainbow Trout fishing at Lake Koeneman

In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 6 to 24 ft before dropping to 5 to 24 ft for winter. Winter rainbow trout concentrate at Break off the point, a prime-rated drop-off around 11 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Main-lake point (8 ft)	Inline spinner (silver), Small spoon
Summer	6 to 24 ft	dawn & dusk	Break off the point (11 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	7 to 24 ft	dawn & dusk	Main-lake point (8 ft)	Casting spoon, Jerkbait over shoals
Winter	5 to 24 ft	dawn	Break off the point (11 ft)	Jigging spoon, Tube jig (white)

Brown Trout fishing at Lake Koeneman

When the water first warms, brown trout slide up into 3 to 24 ft. There's no big seasonal slide here — summer means 7 to 24 ft, winter 3 to 24 ft. Start at Break off the point. It's a drop-off holding about 11 ft of water and rates prime come summer. The feeding windows run after dark and early morning. Keep a spoon at the thermocline or a deep stickbait (night) rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 24 ft	dawn & dusk	Main-lake point (8 ft)	Stickbait off planer boards (shallow), Small spoon along mud lines
Summer	7 to 24 ft	night & dawn	Break off the point (11 ft)	Spoon at the thermocline, Deep stickbait (night)
Fall	4 to 24 ft	dusk & dawn	Main-lake point (8 ft)	Jerkbait over gravel, Casting spoon
Winter	3 to 24 ft	dawn	Break off the point (11 ft)	Jigging spoon, Small stickbait (slow)

Brook Trout fishing at Lake Koeneman

Spring puts brook trout in skinny water — 2 to 15 ft is the zone. Warm water sends them out to 7 to 24 ft; cold water stacks them in 3 to 20 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for summer brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Main-lake point (8 ft)	Small inline spinner (gold), Tiny spoon
Summer	7 to 24 ft	dawn & dusk	Deep basin (20 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (8 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Deep basin (20 ft)	Small jigging spoon, Tungsten jig + plastic

Yellow Perch fishing at Lake Koeneman

When the water first warms, yellow perch slide up into 3 to 12 ft. By summer they slide out to 7 to 24 ft, and by winter most fish are in 7 to 24 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (3 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	7 to 24 ft	dawn	Deep basin (20 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	7 to 24 ft	midday	Deep basin (20 ft)	Jigging spoon (small), Perch rig / spreader
Winter	7 to 24 ft	midday & dawn	Deep basin (20 ft)	Tungsten jig + spikes, Rattle spoon (small)

Notable structure

The chart marks 4 structure features on Lake Koeneman; the deepest is Deep basin at about 20 ft.

Deep basin: deep basin, around 20 ft
Break off the point: drop-off, around 11 ft
Main-lake point: point, around 8 ft
Shallow bay flat: weed flat, around 3 ft

Lake Koeneman stocking report

Date	Species	Count	Size
Feb 18	Rainbow trout	50	—
Oct 22, 2025	Rainbow trout	1,250	—
Oct 22, 2025	Cutthroat trout	400	—

Source: WDFW fish-stocking reports, retrieved 2026-08-18.

Lake Koeneman fishing regulations

Season dates, license requirements, and size and bag limits for Washington waters are set by the Washington Department of Fish and Wildlife — and special regulations can apply to Lake Koeneman specifically, so confirm the current rules before you fish.

Check the official Washington fishing regulations →

Common questions

How deep is Lake Koeneman?

Lake Koeneman is about 24 ft (7 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.

What fish are in Lake Koeneman?

Anglers target rainbow trout, brown trout, brook trout, yellow perch on Lake Koeneman.

Where is the best fishing spot on Lake Koeneman?

Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for yellow perch in spring. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Lake Koeneman?

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.

Is Lake Koeneman stocked with fish?

Yes — per WDFW fish-stocking reports records, Lake Koeneman was most recently stocked Feb 18 with 50 rainbow trout. The full stocking history is listed above.

What are the fishing regulations for Lake Koeneman?

Fishing on Lake Koeneman is regulated by the Washington Department of Fish and Wildlife. Check the official Washington regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.

Nearby waters

Carney Lake 1 mi · Wye Lake 2 mi · Devereaux Lake 3 mi · Prickett Lake 5 mi · Horseshoe Lake 6 mi · Tiger Lake 8 mi · Benson Lake 8 mi · Panther Lake 8 mi · Mission Lake 9 mi · Mason Lake 10 mi · Haven Lake 10 mi · Lake Wooten 10 mi

See how Lake Koeneman stacks up: best rainbow trout lakes in Washington · best yellow perch lakes in Washington · best brown trout lakes in Washington · best brook trout lakes in Washington

Browse all Washington fishing maps or see every water on DepthScout. 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.