Mill Creek Fishing Regulations
Mason County, Washington · 2026 size limits, bag limits, and seasons
Mill Creek is a creek in Mason County, Washington. It has its own fishing regulations for 9 species, including Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout. These rules replace Washington's statewide limits on this water.
Map of Mill Creek
Fish with special rules on Mill Creek
Tap a fish for identification tips, size records, and the best bait.
Mill Creek limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesSelective gear rules. | – | – | Year-round |
 Brook TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
 Brown TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
 Cutthroat TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
| – | Catch & release only | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 | |
 Golden TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
 Lake TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
| Other Game FishStatewide min. size/daily limit. | – | – | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
 Rainbow TroutRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
 SteelheadRelease cutthroat trout and wild rainbow trout. | 14" min | 2 | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
| Wild Rainbow TroutWild fish only | – | Catch & release only | May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31 |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
Plan your Mill Creek trip
Mill Creek fishing: common questions
What fish have special regulations on Mill Creek?
9 species have rules specific to Mill Creek: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Other Game Fish, Rainbow Trout, and Steelhead, and 1 more.
What is the brook trout limit on Mill Creek?
Brook Trout must be at least 14" to keep on Mill Creek, and the daily bag limit is 2. Season: May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31.
What is the brown trout limit on Mill Creek?
Brown Trout must be at least 14" to keep on Mill Creek, and the daily bag limit is 2. Season: May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31.
What is the cutthroat trout limit on Mill Creek?
Cutthroat Trout must be at least 14" to keep on Mill Creek, and the daily bag limit is 2. Season: May 23 – Oct 31 · Sat. before Memorial Day-Oct. 31. Limits change during the year.
Is Mill Creek catch and release?
Some rules on Mill Creek are catch and release only, covering Cutthroat Trout and Wild Rainbow Trout. Check the table for the section and dates that apply.
Do Washington statewide fishing rules apply on Mill Creek?
Where Mill Creek has its own rule for a species, that rule replaces the statewide limit. For species not listed on this page, Washington's statewide regulations apply. Regulations are set by the Washington Department of Fish and Wildlife; confirm with the official 2026 regulations before keeping a fish.
Other Washington waters with special regulations
- Yakima River · Benton
- Columbia River
- Wind River · Skamania
- Drano Lake · Skamania
- Naselle River · Pacific
- Roosevelt Lake · Ferry/Grant/Lincoln/Okanogan/Stevens
- Cowlitz River · Cowlitz/Lewis
- Green River · Duwamish
- Grays River · Wahkiakum
- Nisqually River · Pierce/Thurston
- Nooksack River · Whatcom
- Humptulips River · Grays Harbor
Take Mill Creek rules on the water
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