About Bosak Lake
Bosak Lake is a scenic Polk County lake worth knowing about, covering 13 acres. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Type: lake · Hydrology: DRAINAGE
Lake Location
45.64320° N, 92.33830° W
WBIC 2666000 · Wisconsin DNRLocal's Guide
Fishing
Species-specific tips above. Wisconsin fishing license required for ages 16+. See current season regulations below.
View fishing regulations ↓Swimming
Check conditions before swimming. No lifeguard on duty. Watch for aquatic vegetation near shorelines.
Content coming soon
Nearby Dining
Looking for supper clubs and bait shops near Bosak Lake? Local dining recommendations coming soon.
Content coming soon
Insider Tips
Local knowledge about Bosak Lake — best times to visit, quiet spots, and what the regulars know. Contributed tips coming soon.
Content coming soon
Lake Conditions
Water Clarity
—
No data
Trophic Status
—
No data
Invasive Weeds
Not documented
Clean lake
Seasonal Notes
Coming soon
Ice-out dates, peak fishing windows
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Frequently Asked Questions
Can you boat on Bosak Lake?
Bosak Lake does not currently have a public boat landing listed in the Wisconsin DNR database. Shore fishing or kayak/canoe access may still be available — check local access points.
How big is Bosak Lake?
Bosak Lake has 13 acres in surface area.
Are there invasive species in Bosak Lake?
No invasive species are currently documented in Bosak Lake by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Bosak Lake located?
Bosak Lake is located in Polk County, Wisconsin. GPS coordinates: 45.6432° N, 92.3383° W.
Are there vacation rentals on Bosak Lake?
Stay Northern is building the most complete rental directory for Polk County lakes. Check our Bosak Lake vacation rentals listing — if none are available yet, check back soon or browse nearby Polk County lake rentals.
Fishing Regulations
Current season regulations for Bosak Lake
| Species | Season | Min. Length | Daily Bag |
|---|---|---|---|
| Bullheads | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Catfish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Cisco And Whitefish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Lake Sturgeon | Closed | No fishing allowed. | — |
| Largemouth Bass And Smallmouth Bass | May 2, 2026 to March 7, 2027 | The minimum length limit is 14" and the daily bag limit is 5. | — |
| Muskellunge And Hybrids | May 2, 2026 to December 31, 2026 on open water | The minimum length limit is 40" and the daily bag limit is 1. | — |
| Northern Pike | May 2, 2026 to March 7, 2027 | No minimum length limit and the daily bag limit is 5. | — |
| Paddlefish | Closed | No fishing allowed. | — |
| Panfish | Open All Year | No minimum length limit and the daily bag limit is 25. | — |
| Rock, Yellow, And White Bass | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Rough Fish | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Round Goby | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Ruffe | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Shovelnose Sturgeon | Closed | No fishing allowed. | — |
| Trout | See specific regulations | https://dnr.wisconsin.gov/topic/fishing/trout/ . | — |
| Walleye, Sauger, And Hybrids | May 2, 2026 to March 7, 2027 | The minimum length is 15", but walleye, sauger, and hybrids from 20" to 24" may not be kept, and only 1 fish over 24" is allowed. The daily bag limit is 3. | — |
| White Perch | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
Regulations sourced from Wisconsin DNR fisheries data. Always verify current regulations before fishing.
Lake Details
- WBIC
- 2666000
- County
- Polk County
- Surface Area
- 13 acres
- Lake Type
- lake
- Coordinates
- 45.6432, -92.3383
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Bosak Lake? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 3/24/2026.