Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Recent public catches load as you reach this section.
200-acre lake near Mason County. The lake tops out around 23 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Species by species, here's what the data says the year looks like.
The outline encloses 200 acres, worked by 2.3 miles of shoreline. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. Littoral water — the productive band under ~15 ft — makes up 57% of this chart. Call it 0.9 mi long by 0.4 mi wide at the broadest reach. It sits in Mason County. If the bite dies, Island Lake is 5 mi to the north.
Early season rainbow trout use the shallows, holding in 5 to 20 ft. Expect a summer slide to 6 to 23 ft, then a winter hold in 5 to 23 ft. Put Creek inflow first on the milk run — an inflow / creek mouth near 15 ft that grades prime for spring. 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.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Creek inflow (15 ft) | Inline spinner (silver), Small spoon |
| Summer | 6 to 23 ft chart-limited; documented 8 to 30 ft | dawn & dusk | Creek inflow (15 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 23 ft chart-limited; documented 10 to 35 ft | dawn & dusk | Old creek channel (23 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 23 ft chart-limited; documented 8 to 40 ft | dawn | Break off the point (23 ft) | Jigging spoon, Tube jig (white) |
When the water first warms, brown bullhead slide up into 2 to 8 ft. By summer they slide out to 3 to 12 ft, and by winter most fish are in 7 to 23 ft. If you only fish one area, make it Deep basin: a deep basin around 23 ft that scores prime in winter. In summer the feeding windows fall in after dark and the evening.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (1 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (1 ft) | |
| Fall | 5 to 15 ft | dusk | open water | |
| Winter | 7 to 23 ft chart-limited; documented 10 to 25 ft | midday | Deep basin (23 ft) |
Spring puts cutthroat trout in skinny water — 3 to 15 ft is the zone. Warm water sends them out to 7 to 23 ft; cold water stacks them in 6 to 23 ft. Creek inflow is the standout, an inflow / creek mouth at roughly 15 ft, rated prime for spring cutthroat trout. Plan around early morning and the evening in the warm months. A trolled spoon (small) or an inline spinner covers the summer program.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Creek inflow (15 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 7 to 23 ft chart-limited; documented 10 to 35 ft | dawn & dusk | Break off the point (23 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 23 ft chart-limited; documented 5 to 25 ft | dawn & dusk | Creek inflow (15 ft) | Casting spoon, Inline spinner |
| Winter | 6 to 23 ft chart-limited; documented 10 to 40 ft | dawn | Break off the point (23 ft) | Small jigging spoon, Marabou jig |
When the water first warms, largemouth bass slide up into 2 to 10 ft. Summer is an 8 to 20 ft game here, winter a 7 to 23 ft one. Start at Break off the point. It's a drop-off holding about 23 ft of water and rates prime come winter. 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.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (1 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (23 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (1 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 7 to 23 ft chart-limited; documented 15 to 35 ft | midday | Break off the point (23 ft) | Blade bait, Jigging spoon |
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. Warm water sends them out to 7 to 23 ft; cold water stacks them in 7 to 23 ft. Top water on the chart: Deep basin, a deep basin in the 23 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.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 7 to 23 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (23 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 7 to 23 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (23 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 7 to 23 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (23 ft) | Tungsten jig + spikes, Rattle spoon (small) |
9 pieces of structure are mapped here — Deep basin, around 23 ft, is the deepest of them.
Access data: Washington WDFW — Water Access Sites. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Oct 6, 2025 | Rainbow trout | 8,325 | — |
Source: WDFW fish-stocking reports, retrieved 2026-09-23.
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 Isabella Lake specifically, so confirm the current rules before you fish.
Check the official Washington fishing regulations →
Isabella Lake is about 23 ft (7 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target rainbow trout, brown bullhead, cutthroat trout, largemouth bass, yellow perch on Isabella Lake.
Creek inflow is the top-rated area: an inflow / creek mouth in about 15 ft of water that rates prime for rainbow trout in spring. The interactive chart above rates every spot for each species and season.
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.
Yes — per WDFW fish-stocking reports records, Isabella Lake was most recently stocked Oct 6, 2025 with 8,325 rainbow trout. The full stocking history is listed above.
Fishing on Isabella 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.
Island Lake 5 mi · Lost Lake 6 mi · Forbes Lake 7 mi · Summit Lake 8 mi · Lake Limerick 9 mi · Phillips Lake 9 mi · Spencer Lake 10 mi · Budd Inlet 11 mi · Nahwatzel Lake 11 mi · Mason Lake 14 mi · Black Lake 14 mi · Benson Lake 14 mi
See how Isabella Lake stacks up: best largemouth bass lakes in Washington · best rainbow trout lakes in Washington · best yellow perch lakes in Washington · best cutthroat trout lakes in Washington
More water nearby: Mason County fishing maps (14 charts). Browse all Washington fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.