About Big Eau Pleine River -Un Bay
Big Eau Pleine River -Un Bay is a scenic Marathon County lake worth knowing about, covering 71 acres. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Type: lake · Hydrology: DRAINAGE
Lake Location
44.78960° N, 89.97660° W
WBIC 1428600 · 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
Big Eau Pleine River -Un Bay has limited visibility and a mixed bottom, making it generally good for swimming with gradual entry in most areas. The 71-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Big Eau Pleine River -Un Bay are coming soon. Know a great spot near Big Eau Pleine River -Un Bay? Share it at staynorthern.com/contact. Looking for restaurants near Marathon County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Big Eau Pleine River -Un Bay is one of Marathon 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 Big Eau Pleine River -Un Bay 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 typically arrives in mid-April on central Wisconsin lakes. Fishing season hits its stride in mid-May and runs strong through June and again in fall. Swimming conditions are best from late June through mid-August. Fall color peaks in early-to-mid October. Ice fishing season runs late December through February in most years.
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Frequently Asked Questions
Can you boat on Big Eau Pleine River -Un Bay?
Big Eau Pleine River -Un Bay 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 Big Eau Pleine River -Un Bay?
Big Eau Pleine River -Un Bay has 71 acres in surface area.
Are there invasive species in Big Eau Pleine River -Un Bay?
No invasive species are currently documented in Big Eau Pleine River -Un Bay by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Big Eau Pleine River -Un Bay located?
Big Eau Pleine River -Un Bay is located in Marathon County, Wisconsin. GPS coordinates: 44.7896° N, 89.9766° W.
Are there vacation rentals on Big Eau Pleine River -Un Bay?
Stay Northern is building the most complete rental directory for Marathon County lakes. Check our Big Eau Pleine River -Un Bay vacation rentals listing — if none are available yet, check back soon or browse nearby Marathon County lake rentals.
Fishing Regulations
Current season regulations for Big Eau Pleine River -Un Bay
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
- 1428600
- County
- Marathon County
- Surface Area
- 71 acres
- Lake Type
- lake
- Coordinates
- 44.7896, -89.9766
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Big Eau Pleine River -Un Bay? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/29/2026.