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Rattlesnake Lake trout stocking

King County, Washington · lake

Rattlesnake Lake was last stocked 6 months ago (Apr 6, 2026). We have 4 stockings on record since Apr 8, 2025, 2 in the last 12 months (11,164 fish). Most stockings come in April. Species stocked: rainbow trout, cutthroat trout.

Last stocked
6 months ago
Apr 6, 2026
Next planned
Not announced
Last 12 months
2 stockings
11,164 fish
Water temperature
63°F
Ideal for trout

River conditions

Nearest USGS gage: CANYON CREEK NEAR CEDAR FALLS, WA (1 km away, on a different stream or lake).

Water temperature
63°F
Flow
1 cfs
much lower than usual for the last six weeks
Gage height
0.71 ft

Ideal for trout. Prime range for trout (about 50 to 65°F): fish are feeding actively.

495867Aug 11Sep 23
Water temperature (daily high), last six weeks (°F), daily. Latest: 63 °F on Sep 23. The green band is the ideal range for trout.
0611Aug 11Sep 23
Streamflow, last six weeks (cfs), daily. Latest: 1 cfs on Sep 23.

Latest reading Sep 25, 2026, 2:15 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Rattlesnake Lake

  • Tonight
    51°F
    Light Rain
    82% rain · wind 1 mph
  • Friday
    58°F
    Showers And Thunderstorms
    98% rain · wind 1 to 8 mph
  • Friday Night
    43°F
    Rain then Mostly Cloudy
    76% rain · wind 1 to 9 mph
  • Saturday
    58°F
    Mostly Sunny
    wind 2 mph
  • Saturday Night
    41°F
    Mostly Cloudy
    wind 2 mph
  • Sunday
    61°F
    Mostly Sunny
    3% rain · wind 2 mph

Forecast from the National Weather Service for this location, refreshed hourly.

When is Rattlesnake Lake stocked?

Most stockings come in April.

By month, all years

Jan: 0 stockingsJanFeb: 0 stockingsFebMar: 0 stockingsMarApr: 2 stockings2AprMay: 0 stockingsMayJun: 0 stockingsJunJul: 0 stockingsJulAug: 0 stockingsAugSep: 0 stockingsSepOct: 1 stockings1OctNov: 0 stockingsNovDec: 0 stockingsDec
Stockings of Rattlesnake Lake by month, all years on record. This month is shown in blue.

Year by year

JanFebMarAprMayJunJulAugSepOctNovDec
20261
202511

What is stocked

SpeciesStockingsFishFish per stockingTypical size
Rainbow trout312,8294,276
Cutthroat trout11,8351,835

Stocking history

DateSpeciesFishPoundsHatchery
Apr 6, 2026Rainbow trout2,0001,000Tokul Cr Hatchery
Oct 22, 2025Cutthroat trout1,8356Tokul Cr Hatchery
Oct 22, 2025Rainbow trout7,32932Tokul Cr Hatchery
Apr 8, 2025Rainbow trout3,5001,667Tokul Cr Hatchery

From Washington fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.

Where is Rattlesnake Lake?

King County, Washington. Approximate: the marker is the USGS place-name point for this water, not an agency location.

DirectionsLarger map

Stocked waters near Rattlesnake Lake

All stocked waters in King CountyStocked this week in Washington

Questions about Rattlesnake Lake

When was Rattlesnake Lake last stocked?
The latest reported stocking was Apr 6, 2026 (rainbow trout, 2,000 fish), according to Washington agency reports.
How often is Rattlesnake Lake stocked?
It was stocked 2 times in the last 12 months. Across all years on record, most stockings come in April.
What kind of trout are stocked in Rattlesnake Lake?
Rainbow trout (3 stockings, 12,829 fish); Cutthroat trout (1 stocking, 1,835 fish).
How warm is the water near Rattlesnake Lake?
The nearest USGS gage read 63°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.