Osoyoos Lake Fishing Regulations
Okanogan County, Washington · 2026 size limits, bag limits, and seasons
Osoyoos Lake is a lake in Okanogan County, Washington. It has its own fishing regulations for 4 species, including Channel Catfish, Largemouth Bass, Smallmouth Bass, and Walleye. These rules replace Washington's statewide limits on this water.
Map of Osoyoos Lake
Fish with special rules on Osoyoos Lake
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Osoyoos Lake limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
 Channel Catfish | – | 10 | Year-round |
 Largemouth Bass1 over 17” may be retained. | 12" max | 10 | Year-round |
 Smallmouth BassOnly 1 over 14” may be retained. | – | 15 | Year-round |
 WalleyeOnly 1 over 22” may be retained. | – | 16 | Year-round |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
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Osoyoos Lake fishing: common questions
What fish have special regulations on Osoyoos Lake?
4 species have rules specific to Osoyoos Lake: Channel Catfish, Largemouth Bass, Smallmouth Bass, and Walleye.
What is the channel catfish limit on Osoyoos Lake?
No size limit is listed for Channel Catfish on Osoyoos Lake, and the daily bag limit is 10.
What is the largemouth bass limit on Osoyoos Lake?
Largemouth Bass have a maximum size of 12" on Osoyoos Lake, and the daily bag limit is 10.
What is the smallmouth bass limit on Osoyoos Lake?
No size limit is listed for Smallmouth Bass on Osoyoos Lake, and the daily bag limit is 15.
Do Washington statewide fishing rules apply on Osoyoos Lake?
Where Osoyoos 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
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