About Black River -Un Slough
Black River -Un Slough is a scenic La Crosse County lake worth knowing about, covering 184 acres. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Type: lake · Hydrology: DRAINAGE
Lake Location
43.95830° N, 91.32240° W
WBIC 1676800 · 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
Black River -Un Slough has limited visibility and a mixed bottom, making it generally good for swimming with gradual entry in most areas. The 184-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Black River -Un Slough are coming soon. Know a great spot near Black River -Un Slough? Share it at staynorthern.com/contact. Looking for restaurants near La Crosse County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Black River -Un Slough is one of La Crosse County's lesser-known gems — the kind of place locals return to year after year. Early mornings before 9am offer the calmest water and best fishing before boat traffic picks up. If you're visiting for the first time, check the DNR boat landing locations before you arrive — some are well-marked, others take a local to find. Know something about Black River -Un Slough that visitors should? Share a tip at staynorthern.com/contact — we add the best ones to this page.
Lake Conditions
Water Clarity
—
No data
Trophic Status
—
No data
Invasive Weeds
Not documented
Clean lake
Seasonal Notes
See below
Ice-out dates, peak fishing windows
Ice out arrives in late March to early April on southern Wisconsin lakes. Bass and panfish fishing is excellent from early May onward. Swimming season runs from early June through September. Fall color peaks in mid-October. Ice fishing is possible in most winters but season length varies — check conditions before heading out.
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Frequently Asked Questions
Can you boat on Black River -Un Slough?
Black River -Un Slough 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 Black River -Un Slough?
Black River -Un Slough has 184 acres in surface area.
Are there invasive species in Black River -Un Slough?
No invasive species are currently documented in Black River -Un Slough by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Black River -Un Slough located?
Black River -Un Slough is located in La Crosse County, Wisconsin. GPS coordinates: 43.9583° N, 91.3224° W.
Are there vacation rentals on Black River -Un Slough?
Stay Northern is building the most complete rental directory for La Crosse County lakes. Check our Black River -Un Slough vacation rentals listing — if none are available yet, check back soon or browse nearby La Crosse County lake rentals.
Fishing Regulations
Current season regulations for Black River -Un Slough
Regulation data is not available for this lake. Check with the Wisconsin DNR for current season rules before fishing.
Regulations sourced from Wisconsin DNR fisheries data. Always verify current regulations before fishing.
Lake Details
- WBIC
- 1676800
- County
- La Crosse County
- Surface Area
- 184 acres
- Lake Type
- lake
- Coordinates
- 43.9583, -91.3224
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Black River -Un Slough? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/29/2026.