Big Twin Lake Fishing Regulations
Okanogan County, Washington · 2026 size limits, bag limits, and seasons
Big Twin Lake is a lake in Okanogan County, Washington. It has its own fishing regulations for 7 species, including Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout. These rules replace Washington's statewide limits on this water.
Map of Big Twin Lake
Fish with special rules on Big Twin Lake
Tap a fish for identification tips, size records, and the best bait.
Big Twin Lake limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesSelective gear rules apply · No gas motors | – | – | Always open |
 Brook Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Brown Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Cutthroat Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Golden Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Lake Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Rainbow Trout | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
 Steelhead | 18" min | 1 | Apr 22 – Oct 31 · Opens 4th Sat. in Apr. |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
Plan your Big Twin Lake trip
Big Twin Lake fishing: common questions
What fish have special regulations on Big Twin Lake?
7 species have rules specific to Big Twin Lake: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, and Steelhead.
What is the brook trout limit on Big Twin Lake?
Brook Trout must be at least 18" to keep on Big Twin Lake, and the daily bag limit is 1. Season: Apr 22 – Oct 31 · Opens 4th Sat. in Apr..
What is the brown trout limit on Big Twin Lake?
Brown Trout must be at least 18" to keep on Big Twin Lake, and the daily bag limit is 1. Season: Apr 22 – Oct 31 · Opens 4th Sat. in Apr..
What is the cutthroat trout limit on Big Twin Lake?
Cutthroat Trout must be at least 18" to keep on Big Twin Lake, and the daily bag limit is 1. Season: Apr 22 – Oct 31 · Opens 4th Sat. in Apr..
Do Washington statewide fishing rules apply on Big Twin Lake?
Where Big Twin Lake 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 Big Twin Lake rules on the water
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