About Fortyacre Lake
Fortyacre Lake is a scenic Pepin County lake worth knowing about, a mid-sized lake at 139 acres and up to 9 feet deep. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Bottom composition: 35% sand, 0% gravel, 0% rock, 65% muck
Type: lake · Hydrology: SEEPAGE
Lake Location
44.41890° N, 92.09650° W
WBIC 731300 · 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
Fortyacre Lake has limited visibility and a gravel and sand bottom, making it better suited for boating and fishing than swimming. The 139-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Fortyacre Lake are coming soon. Know a great spot near Fortyacre Lake? Share it at staynorthern.com/contact. Looking for restaurants near Pepin County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Fortyacre Lake is one of Pepin 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 Fortyacre Lake 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 Fortyacre Lake?
Fortyacre 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 Fortyacre Lake?
Fortyacre Lake has 139 acres in surface area, a maximum depth of 9 feet.
What is the bottom of Fortyacre Lake like?
The lake bottom is composed of 35% sand, 0% gravel, 0% rock, 65% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Fortyacre Lake?
No invasive species are currently documented in Fortyacre Lake by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Fortyacre Lake located?
Fortyacre Lake is located in Pepin County, Wisconsin. GPS coordinates: 44.4189° N, 92.0965° W.
Are there vacation rentals on Fortyacre Lake?
Stay Northern is building the most complete rental directory for Pepin County lakes. Check our Fortyacre Lake vacation rentals listing — if none are available yet, check back soon or browse nearby Pepin County lake rentals.
Fishing Regulations
Current season regulations for Fortyacre Lake
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
- 731300
- County
- Pepin County
- Surface Area
- 139 acres
- Max Depth
- 9 ft
- Bottom
- 35% sand, 0% gravel, 0% rock, 65% muck
- Lake Type
- lake
- Coordinates
- 44.4189, -92.0965
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Fortyacre Lake? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/30/2026.