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289-acre lake near Pend Oreille County. The lake tops out around 90 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. What the data behind the map says about each species, season by season:
Traced from the shoreline, Marshall Lake runs 289 acres with 2.6 miles of edge. Its 1.1 shoreline index means few bank features; the contours below do the pattern work. The shallow band under 15 ft claims about 6% of the surface — that's where the groceries are. Tip to tip the water measures near 1 mi with a 0.7-mi widest point. You'll find it in Pend Oreille County. The nearest mapped water is South Skookum Lake, 10 mi to the northwest.
Early season cutthroat trout use the shallows, holding in 3 to 15 ft. Expect a summer slide to 10 to 35 ft, then a winter hold in 10 to 40 ft. In summer the feeding windows fall in early morning and the evening. Tie on a trolled spoon (small) or an inline spinner and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | open water | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | open water | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | open water | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | open water | Small jigging spoon, Marabou jig |
The chart marks 4 structure features on Marshall Lake; the deepest is Deep basin at about 90 ft.
Access data: Washington WDFW — Water Access Sites. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| May 19 | Cutthroat trout | 32,340 | — |
| Oct 21, 2025 | Cutthroat trout | 23,430 | — |
Source: WDFW fish-stocking reports, retrieved 2026-08-18.
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 Marshall Lake specifically, so confirm the current rules before you fish.
Check the official Washington fishing regulations →
Marshall Lake is about 90 ft (27 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target cutthroat trout on Marshall Lake.
For cutthroat 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, Marshall Lake was most recently stocked May 19 with 32,340 cutthroat trout. The full stocking history is listed above.
Fishing on Marshall 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.
South Skookum Lake 10 mi · Davis Lake 10 mi · Diamond Lake 11 mi · North Skookum Lake 11 mi · Blue Lake 11 mi, ID · Sacheen Lake 14 mi · Fan Lake 21 mi · Round Lake 21 mi, ID · Eloika Lake 22 mi · Kelso Lake 24 mi, ID · Priest Lake 26 mi, ID · Shepherd Lake 26 mi, ID
See how Marshall Lake stacks up: best cutthroat trout lakes in Washington
More water nearby: Pend Oreille County fishing maps (11 charts). 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.