Big Twin Lake
Big Twin Lake in Langlade County, Wisconsin has a water quality grade of B (Good). Water clarity: 20 ft visibility. Phosphorus: 14.1 µg/L. Maximum depth: 25 ft. Surface area: 66 acres.
- Clarity
- 20 ft
- Typical in August
- 74°F
- Max depth
- 25 ft
- Area
- 66 acres
- Type
- Oligotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Langlade County
Big Twin Lake is a 66-acre cold, clear oligotrophic lake in Langlade County, Wisconsin with a maximum depth of 25 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 10 other monitored lakes in Langlade County, Big Twin Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-28. Grade methodology: LakeGrade methodology.
Watch Big Twin Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Crystal clear, you can see 20 ft down. Phosphorus level: 14.1 µg/L. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 20 ft | Not graded |
| Phosphorus | 14.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Big Twin Lake
Compare lakeside cabins, hotels, and vacation rentals near Big Twin Lake in Langlade County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Big Twin Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Big Twin Lake typically sits around 74°F at the surface in August. Summer average is about 76°F. Usually warmest in Jul (about 78°F) and coldest in Aug (about 74°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 8 field readings (2024–2026) via the EPA Water Quality Portal. See the full Big Twin Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 25 ft |
| Surface Area | 66 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Big Twin LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Big Twin Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2008. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.179 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.95 µg/L/yr | 6 |
County Ranking
Ranked #5 of 11 lakes in Langlade County
Nearby Lakes in Langlade County
Frequently asked questions about Big Twin Lake
What is the water quality grade for Big Twin Lake?
- Big Twin Lake in Langlade County, Wisconsin has a water quality grade of B (Good). Water clarity: 20 ft visibility. Phosphorus: 14.1 µg/L. Maximum depth: 25 ft. Surface area: 66 acres.
Is Big Twin Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Big Twin Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Big Twin Lake?
- Big Twin Lake typically sits around 74°F at the surface in August, from 8 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Big Twin Lake?
- Big Twin Lake has a maximum depth of 25 feet. The lake covers 66 acres.
What fish are in Big Twin Lake?
- Fish species found in Big Twin Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Big Twin Lake is located in Langlade County, Wisconsin.
Are there boat ramps on Big Twin Lake?
- Big Twin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Big Twin Lake. Public access is listed as yes.
Explore Big Twin Lake across LakeGrade
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Langlade County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Lakes in the Wolf River Watershed, ranked by water quality
Low nutrients, clear water, excellent for swimming
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Oligotrophic Lakes in Wisconsin
Where this data comes from
35 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX35 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory