About Un Spring
Un Spring is a scenic Jefferson County lake worth knowing about, a intimate 0.19-acre lake reaching 8 feet at its deepest. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Bottom composition: 0% sand, 0% gravel, 0% rock, 99% muck
Type: lake
Lake Location
42.87930° N, 88.70370° W
WBIC 788200 · 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
Un Spring has limited visibility and a gravel and sand bottom, making it better suited for boating and fishing than swimming. The 0.19-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Un Spring are coming soon. Know a great spot near Un Spring? Share it at staynorthern.com/contact. Looking for restaurants near Jefferson County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Un Spring is one of Jefferson 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 Un Spring 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 Un Spring?
Un Spring 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 Un Spring?
Un Spring has 0.19 acres in surface area, a maximum depth of 8 feet.
What is the bottom of Un Spring like?
The lake bottom is composed of 0% sand, 0% gravel, 0% rock, 99% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Un Spring?
No invasive species are currently documented in Un Spring by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Un Spring located?
Un Spring is located in Jefferson County, Wisconsin. GPS coordinates: 42.8793° N, 88.7037° W.
Are there vacation rentals on Un Spring?
Stay Northern is building the most complete rental directory for Jefferson County lakes. Check our Un Spring vacation rentals listing — if none are available yet, check back soon or browse nearby Jefferson County lake rentals.
Fishing Regulations
Current season regulations for Un Spring
| 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 | The minimum length limit is 26" and the daily bag limit is 2. | — |
| 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 limit is 15" and 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
- 788200
- County
- Jefferson County
- Surface Area
- 0.19 acres
- Max Depth
- 8 ft
- Bottom
- 0% sand, 0% gravel, 0% rock, 99% muck
- Lake Type
- lake
- Coordinates
- 42.8793, -88.7037
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Un Spring? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/30/2026.