South Twin Lake Depth Map & Fishing Spots (OR)

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 South Twin 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 South Twin Lake on the board.

Fishing South Twin Lake: what the data says

103-acre lake in Oregon. The lake tops out around 50 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. Here's the year, species by species, as the scoring engine sees it.

The outline encloses 103 acres, worked by 1.4 miles of shoreline. The basin is a simple one (shoreline index 1) — close to a bowl, so the structure on the chart matters more than the bank. The shallow band under 15 ft claims about 41% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 0.5 mi with a 0.5-mi widest point. Its nearest charted neighbour, Crane Prairie Reservoir, is 5 mi to the north.

Rainbow Trout fishing at South Twin Lake

Come spring, look for rainbow trout tight to the bank in 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 23 ft that scores prime in winter. Best bite is early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon is the honest summer answer here.

Season	Depth	Best window	Start at	Go-to baits
Spring	5 to 20 ft	dawn & dusk	Main-lake point (13 ft)	Inline spinner (silver), Small spoon
Summer	8 to 30 ft	dawn & dusk	Break off the point (23 ft)	Dodger + spoon (deep troll), Flutter spoon
Fall	10 to 35 ft	dawn & dusk	Main-lake point (13 ft)	Casting spoon, Jerkbait over shoals
Winter	8 to 40 ft	dawn	Break off the point (23 ft)	Jigging spoon, Tube jig (white)

Brown Trout fishing at South Twin Lake

Start shallow in spring: brown trout sit in 3 to 25 ft that time of year. Summer pushes them deeper, 15 to 50 ft, and winter fish settle into 5 to 35 ft. The spot to know is Break off the point, a drop-off in about 23 ft of water that rates prime for brown trout in summer. Warm-month bites cluster around after dark and early morning. Throw a spoon at the thermocline or a deep stickbait (night) until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 25 ft	dawn & dusk	Main-lake point (13 ft)	Stickbait off planer boards (shallow), Small spoon along mud lines
Summer	15 to 50 ft	night & dawn	Break off the point (23 ft)	Spoon at the thermocline, Deep stickbait (night)
Fall	5 to 30 ft	dusk & dawn	Main-lake point (13 ft)	Jerkbait over gravel, Casting spoon
Winter	5 to 35 ft	dawn	Break off the point (23 ft)	Jigging spoon, Small stickbait (slow)

Brook Trout fishing at South Twin Lake

When the water first warms, brook trout slide up into 2 to 15 ft. Summer is a 10 to 30 ft game here, winter a 3 to 20 ft one. Start at Break off the point. It's a drop-off holding about 23 ft of water and rates prime come summer. The feeding windows run early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Main-lake point (13 ft)	Small inline spinner (gold), Tiny spoon
Summer	10 to 30 ft	dawn & dusk	Break off the point (23 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (13 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Shallow bay flat (6 ft)	Small jigging spoon, Tungsten jig + plastic

Yellow Perch fishing at South Twin Lake

Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. As the season builds they drop to 10 to 30 ft, wintering in 15 to 35 ft. Spring yellow perch concentrate at Shallow bay flat, a prime-rated weed flat around 6 ft. Warm-month bites cluster around early morning. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (6 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (23 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (23 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Break off the point (23 ft)	Tungsten jig + spikes, Rattle spoon (small)

Notable structure

South Twin Lake carries 5 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 43 ft down.

Deep basin: deep basin, around 43 ft
Break off the point: drop-off, around 23 ft
Main-lake point: point, around 13 ft
Shallow bay flat: weed flat, around 6 ft
Back-bay flat: weed flat, around 6 ft

South Twin Lake fishing regulations

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

Check the official Oregon fishing regulations →

Common questions

How deep is South Twin Lake?

South Twin Lake is about 50 ft (15 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 South Twin Lake?

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

Where is the best fishing spot on South Twin Lake?

Shallow bay flat is the top-rated area: a weed flat in about 6 ft of water that rates prime for yellow perch in spring. Open the map above to see every rated spot for each species and season.

When is the best time to fish South Twin 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 South Twin Lake?

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

Nearby waters

Crane Prairie Reservoir 5 mi · Deer Lake 10 mi · Charlton Lake 10 mi · Waldo Lake 14 mi · Torrey Lake 14 mi · Hosmer Lake 18 mi · Crescent Lake 20 mi · Sparks Lake 21 mi · Miller Lake 35 mi · Cougar Reservoir 35 mi · McKenzie River 44 mi · Big Lake 46 mi

See how South Twin Lake stacks up: best rainbow trout lakes in Oregon · best yellow perch lakes in Oregon · best brown trout lakes in Oregon · best brook trout lakes in Oregon

Browse all Oregon 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.