Larsen Lake 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 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 Larsen 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 Larsen Lake on the board.

Fishing Larsen Lake: what the data says

8-acre lake in Washington. The lake tops out around 15 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.

Larsen Lake maps at 8 acres behind 0.4 miles of shoreline. A shoreline index of 1 says round and simple: fish relate to depth changes here, not shoreline features. Lake Sammamish sits 3 mi east — the closest neighbouring chart.

Rainbow Trout fishing at Larsen Lake

Early season rainbow trout use the shallows, holding in 4 to 15 ft. Even in summer they hold at 4 to 15 ft; winter keeps them in 3 to 15 ft. Put Break off the point first on the milk run — a drop-off near 14 ft that grades prime for winter. In summer the feeding windows fall in 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	4 to 15 ft	dawn & dusk	Main-lake point (6 ft)	Inline spinner (silver), Small spoon
Summer	4 to 15 ft	dawn & dusk	Break off the point (14 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	4 to 15 ft	dawn & dusk	Main-lake point (6 ft)	Casting spoon, Jerkbait over shoals
Winter	3 to 15 ft	dawn	Break off the point (14 ft)	Jigging spoon, Tube jig (white)

Largemouth Bass fishing at Larsen Lake

When the water first warms, largemouth bass slide up into 2 to 10 ft. Summer is a 5 to 15 ft game here, winter a 5 to 15 ft one. Start at Main-lake point. It's a point holding about 6 ft of water and rates prime come fall. The feeding windows run early morning and the evening. Keep a texas-rigged 10" worm or a deep-diving crankbait rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	dawn & dusk	Main-lake point (6 ft)	Spinnerbait, Chatterbait
Summer	5 to 15 ft	dawn & dusk	Break off the point (14 ft)	Texas-rigged 10" worm, Deep-diving crankbait
Fall	4 to 15 ft	midday & dawn	Main-lake point (6 ft)	Squarebill crankbait (shad), Spinnerbait
Winter	5 to 15 ft	midday	Break off the point (14 ft)	Blade bait, Jigging spoon

Yellow Perch fishing at Larsen Lake

Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. Warm water sends them out to 5 to 15 ft; cold water stacks them in 5 to 15 ft. Top water on the chart: Deep basin, a deep basin in the 15 ft range, prime in fall. Fish it in early morning and you'll meet the bite. Throw a drop-shot micro plastics or a small spoon tipped with worm until the fish tell you otherwise.

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	5 to 15 ft	dawn	Deep basin (15 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	5 to 15 ft	midday	Deep basin (15 ft)	Jigging spoon (small), Perch rig / spreader
Winter	5 to 15 ft	midday & dawn	Deep basin (15 ft)	Tungsten jig + spikes, Rattle spoon (small)

Crappie fishing at Larsen Lake

Come spring, look for crappie tight to the bank in 2 to 8 ft. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. If you only fish one area, make it Deep basin: a deep basin around 15 ft that scores prime in winter. Best bite is early morning and the evening. A jig trolled/spider-rigged or a small crankbait (trolled) is the honest summer answer here.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	open water	1/16 oz jig + tube, Curly-tail grub
Summer	5 to 15 ft	dawn & dusk	Break off the point (14 ft)	Jig trolled/spider-rigged, Small crankbait (trolled)
Fall	5 to 15 ft	dawn	Break off the point (14 ft)	Jig + minnow combo, Small swimbait (1.5-2")
Winter	5 to 15 ft	midday	Deep basin (15 ft)	Tungsten jig + soft plastic, Tiny jigging spoon

Notable structure

Structure-wise the chart holds 3 features, led in depth by Deep basin at roughly 15 ft.

Deep basin: deep basin, around 15 ft
Break off the point: drop-off, around 14 ft
Main-lake point: point, around 6 ft

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

Check the official Washington fishing regulations →

Common questions

How deep is Larsen Lake?

Larsen Lake is about 15 ft (5 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 Larsen Lake?

Anglers target rainbow trout, largemouth bass, yellow perch, crappie on Larsen Lake.

Where is the best fishing spot on Larsen Lake?

Main-lake point is the top-rated area: a point in about 6 ft of water that rates prime for largemouth bass in fall. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Larsen Lake?

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 Larsen Lake?

Fishing on Larsen Lake 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

Lake Sammamish 3 mi · Lake Washington 5 mi · Beaver Lakes 7 mi · Green Lake 10 mi · Crystal Lake 12 mi · Lake Alice 13 mi · Bitter Lake 13 mi · Echo Lake 13 mi · Snoqualmie River 13 mi · Angle Lake 14 mi · Lake Joy 14 mi · Devils Lake 14 mi

See how Larsen Lake stacks up: best largemouth bass lakes in Washington · best crappie lakes in Washington · best rainbow trout lakes in Washington · best yellow perch lakes in Washington

Browse all Washington 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.