Alpine Lake
Alpine Lake in Waushara County, Wisconsin has a water quality grade of B (Good). Phosphorus: 22.7 µg/L. Maximum depth: 18 ft. Surface area: 50 acres.
- Max depth
- 18 ft
- Area
- 50 acres
- Type
- Mesotrophic
- Trend
- → Stable
- Public access
- Yes
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Alpine Lake is a 50-acre mesotrophic lake in Waushara County, Wisconsin with a maximum depth of 18 feet. Water quality is graded B based on 1 sampling years through 2026. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 15 other monitored lakes in Waushara County, Alpine Lake ranks #16 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-23. Grade methodology: LakeQuality methodology.
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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)
No clarity data. Phosphorus level: 22.7 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 22.7 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Alpine Lake
Compare lakeside cabins, hotels, and vacation rentals near Alpine Lake in Waushara 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.
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WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1986. 1 station on file (most recent sample 2025).
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 18 ft |
| Surface Area | 50 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Lake Alpine County ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Alpine 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.
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.9 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.64 µg/L/yr | 7 |
Reservoir Info (USACE NID)
Alpine Lake is a man-made reservoir impounded by the Alpine Lake (completed 1970), built primarily for recreation on the BRUCE (THORSTAD) CREEK; earth-type dam, 25 ft tall and 600 ft long.
- Surface area
- 80 ac
- Normal storage
- 450 ac-ft
- Max storage
- 950 ac-ft
- Drainage area
- 3.5 sq mi
- Hazard class
- Low
- Owner
- Waushara County
Source: USACE National Inventory of Dams, NID ID WI00059 · Operator website
County Ranking
Ranked #16 of 16 lakes in Waushara County
Nearby Lakes in Waushara County
Frequently asked questions about Alpine Lake
Where is Alpine Lake?
- Alpine Lake is a lake in Waushara County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Alpine Lake?
- Alpine Lake in Waushara County, Wisconsin has a water quality grade of B (Good). Phosphorus: 22.7 µg/L. Maximum depth: 18 ft. Surface area: 50 acres.
Is Alpine Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Alpine Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Alpine Lake?
- Alpine Lake has a maximum depth of 18 feet. The lake covers 50 acres.
Are there boat ramps on Alpine Lake?
- Alpine Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Alpine County Park. Public access is listed as yes.
Explore Alpine Lake across LakeQuality
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Fish species and best lakes in Waushara County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Moderate nutrients, good water quality
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State Parks Near Alpine Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
25 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_WQX25 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