Bosworth Lake Fishing Regulations

Snohomish County, Washington · 2026 size limits, bag limits, and seasons

Bosworth Lake is a lake in Snohomish County, Washington. It has its own fishing regulations for 2 species, including Largemouth Bass and Smallmouth Bass. These rules replace Washington's statewide limits on this water.

2 species with limits

Official Washington regulations ↗Washington statewide limits →Washington license costs →

Aerial map of Bosworth Lake, Snohomish County, Washington — 48.0434, -121.9707Directions ↗

Fish with special rules on Bosworth Lake

Tap a fish for identification tips, size records, and the best bait.

Largemouth Bass

12" max · 10/day

Smallmouth Bass

15/day

Bosworth Lake limits by species (2026)

Species	Size limit	Daily bag	Season
Largemouth Bass1 over 17” may be retained.	12" max	10	Apr 25 – Oct 31 · 4th Sat. in Apr.-Oct. 31
Smallmouth BassOnly 1 over 14” may be retained.	–	15	Apr 25 – Oct 31 · 4th Sat. in Apr.-Oct. 31

– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.

Plan your Bosworth Lake trip

Washington fishing regulations →

Statewide size limits, bag limits, and seasons for every species.

Washington fishing license →

Costs for residents and non-residents, and where to buy.

All Washington waters →

Every Washington lake and river with its own fishing rules.

Bosworth Lake fishing: common questions

What fish have special regulations on Bosworth Lake?

2 species have rules specific to Bosworth Lake: Largemouth Bass and Smallmouth Bass.

What is the largemouth bass limit on Bosworth Lake?

Largemouth Bass have a maximum size of 12" on Bosworth Lake, and the daily bag limit is 10. Season: Apr 25 – Oct 31 · 4th Sat. in Apr.-Oct. 31.

What is the smallmouth bass limit on Bosworth Lake?

No size limit is listed for Smallmouth Bass on Bosworth Lake, and the daily bag limit is 15. Season: Apr 25 – Oct 31 · 4th Sat. in Apr.-Oct. 31.

Do Washington statewide fishing rules apply on Bosworth Lake?

Where Bosworth 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