About Long Slough
Long Slough earns its reputation as one of Grant County's premier walleye fisheries, a intimate 35-acre lake reaching 10 feet at its deepest. Access is limited, which keeps boat traffic low — a plus for solitude seekers. The fishery includes Largemouth Bass, Northern Pike, and Panfish.
Bottom composition: 50% sand, 0% gravel, 0% rock, 50% muck
Type: lake · Hydrology: DRAINED
Lake Location
42.68660° N, 90.93260° W
WBIC 721800 · Wisconsin DNRFish Species
Full table →Fishing Tips
- ·Walleye feed most actively at dawn and dusk. Jig along deep structural breaks or troll crankbaits along weedlines at 6–8 ft depth.
- ·Night fishing under a full moon can produce excellent walleye results from late June through August.
- ·Northern pike are ambush predators — target weed edges, fallen timber, and points with large spoons or swimbaits.
- ·Spring pike fishing (ice-out through June) can be outstanding as they move into shallow, warming bays to spawn.
- ·Largemouth bass relate to shallow structure. Work topwater lures at dawn in summer, then switch to soft plastics rigged weedless around lily pads and fallen wood.
- ·Bluegill and crappie stack up in 8–15 ft of water near weedlines. Small jigs tipped with a waxworm are hard to beat.
- ·Panfish are often excellent for kids and beginners — look for them around any dock or submerged brush piles.
Local's Guide
Fishing
Species-specific tips above. Wisconsin fishing license required for ages 16+. See current season regulations below.
View fishing regulations ↓Swimming
Long Slough has limited visibility and a gravel and sand bottom, making it better suited for boating and fishing than swimming. The 35-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Long Slough are coming soon. Know a great spot near Long Slough? Share it at staynorthern.com/contact. Looking for restaurants near Grant County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Long Slough is one of Grant 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 Long 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
What fish can you catch in Long Slough?
Long Slough is home to Catfish, Largemouth Bass (Common), Northern Pike (Common), Panfish (Common), and Walleye. Wisconsin fishing regulations apply — check current seasons and size limits before heading out.
Can you boat on Long Slough?
Long 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 Long Slough?
Long Slough has 35 acres in surface area, a maximum depth of 10 feet.
What is the bottom of Long Slough like?
The lake bottom is composed of 50% sand, 0% gravel, 0% rock, 50% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Long Slough?
No invasive species are currently documented in Long Slough by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Long Slough located?
Long Slough is located in Grant County, Wisconsin. GPS coordinates: 42.6866° N, 90.9326° W.
Are there vacation rentals on Long Slough?
Stay Northern is building the most complete rental directory for Grant County lakes. Check our Long Slough vacation rentals listing — if none are available yet, check back soon or browse nearby Grant County lake rentals.
Fishing Regulations
Current season regulations for Long 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
- 721800
- County
- Grant County
- Surface Area
- 35 acres
- Max Depth
- 10 ft
- Bottom
- 50% sand, 0% gravel, 0% rock, 50% muck
- Lake Type
- lake
- Coordinates
- 42.6866, -90.9326
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Long Slough? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/30/2026.