Langlois Lake

2025 Trout Derby

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Stocked Rainbow Trout provide early season action and stocked Kokanee and resident Largemouth Bass spice the action in mid- to late-season.

This lake is one of only ten waters in King County managed with a seasonal fishing closure. Spring catch rates for trout are highest early in the season and decline as fish are harvested and as warmer water temperatures force trout to seek areas of colder refuge. Fall is often overlooked by anglers, but can be an ideal time as fish that have been growing all summer become more active around the lake with cooler temperatures.

Langlois has a well-developed WDFW access at its east end with a ramp, parking and toilets. Disabled-accessible facilities with paved surface are available.

Two-pole fishing is allowed

Shoreline access: Good - WDFW boat ramp only

Species you might catch

Lake information

County: King
Acreage: 40.60 ac.
Elevation: 138 ft.
Center: 47.637089, -121.888644
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Fishing resources

Catchable fish plants

10 most recent fish plants in this lake
Stock Date	Species	Number Released	Number of Fish Per Pound	Facility

Visit the Catchable Trout Plants page for a more detailed search of trout plants in this or other bodies of water. To view or download the source data for this table visit the WDFW Fish Plants dataset on the Washington State Open Data Portal

Fishing prospects calendar

Rainbow trout

Fishing success for Rainbow Trout is generally best in the spring when thousands of fish are stocked statewide, but they can be caught year-round in most waters with a little patience and persistence. Success remains high into June and gradually declines as water temperatures increase and fish move offshore to stay cool. Fish that escaped the spring harvest return to the nearshore areas in the fall as waters cool off. Some waters may also be stocked again in the fall further boosting catch rates.

Kokanee

The Kokanee fishery typically lasts from April-October before the adults leave the lake to spawn in tributaries starting in late-October and early-November. Fishing is best in the spring before they move into deeper water to avoid warming water temperatures, but they can be targeted throughout the summer in deeper offshore areas near the thermocline. There may be a slight uptick in some waters in the fall as adults return to shallower water and move near shore towards spawning tributaries.

Largemouth bass

Fishing improves throughout the spring as waters warm and fish move onshore, peaking during the spawn. Summer is a slight lull though dawn/dusk hours can be very good. Catch improves in Fall as waters cool, vegetation begins to die back, and prey becomes more available. Winter is the hardest time because fish are offshore and slow moving.