Long Interlaken Lake Deep
Vilas County, Wisconsin380 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Long Interlaken Lake Deep. Here is what has been measured.
- 65 ft max depth
- Limited data
Long Interlaken Lake Deep in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 15 ft visibility. Maximum depth: 65 ft. Surface area: 380 acres.
Wisconsin DNR lists Panfish as common on Long Interlaken Lake Deep. DNR survey details →
Long Interlaken Lake Deep is a 380-acre lake in Vilas County, Wisconsin with a maximum depth of 65 feet. Overall water quality is declining over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-09-14. Methodology: how these readings are compared.
Long Interlaken Lake Deep covers about 380 acres in Vilas County. If you are planning to stay, you can search lake houses and cabins around Long Interlaken Lake Deep on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Long Interlaken Lake Deep is good for
From access and monitoring records, not editorial picks.
- Clear water15 ft of visibility
- Fishing6 species recorded
- Deep water65 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Long Interlaken Lake Deep is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Long Interlaken Lake Deep
These are the measurements Wisconsin DNR publishes for Long Interlaken Lake Deep, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15 ft down. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Long Interlaken Lake Deep
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Long Interlaken Lake Deep.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Long Interlaken Lake Deep’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2019).
Fish Species (DNR-rated)
Lake Details
Max depth
65 ft
Surface area
380 acres
Stays via Stay22
Stays near Long Interlaken Lake Deep
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Fish Species
Click a species to see every lake where it is documented.
Fishing Long Interlaken Lake Deep
- → Long Interlaken Lake Deep fishing: DNR survey catch rates, species & stocking
- → Long Interlaken Lake Deep fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Long Interlaken Lake Deep fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Long Interlaken Lake Deep? (mercury & PFAS guide)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Phosphorus
Worsening+0.8 µg/L/yr5 years
Nearby Lakes in Vilas County
Frequently asked questions about Long Interlaken Lake Deep
Where is Long Interlaken Lake Deep?
- Long Interlaken Lake Deep is a lake in Vilas County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Long Interlaken Lake Deep?
- Long Interlaken Lake Deep in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 15 ft visibility. Maximum depth: 65 ft. Surface area: 380 acres.
Is Long Interlaken Lake Deep safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long Interlaken Lake Deep?
- Long Interlaken Lake Deep has a maximum depth of 65 feet. The lake covers 380 acres.
What fish are in Long Interlaken Lake Deep?
- Fish species found in Long Interlaken Lake Deep include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Long Interlaken Lake Deep is located in Vilas County, Wisconsin.
What did the DNR fisheries survey find at Long Interlaken Lake Deep?
- Wisconsin DNR lists Panfish as common on Long Interlaken Lake Deep. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Long Interlaken Lake Deep’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Long Interlaken Lake Deep across LakeQuality
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Where this data comes from
266 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Lac Du Flambeau Band of Lake Superior Chippewa Indians Water Program (Tribal)
LDFWATER2007266 samples · 2020–2023
Analytical methods
- Turbidity by Nephelometry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes