Dutch Hollow Lake
Dutch Hollow Lake in Sauk County, Wisconsin has a water quality grade of B (Good). Water clarity: 15 ft visibility. Phosphorus: 13.1 µg/L. Maximum depth: 38 ft. Surface area: 172 acres.
- Clarity
- 15 ft
- Max depth
- 38 ft
- Area
- 172 acres
- Type
- Oligotrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Sauk County
Dutch Hollow Lake is a 172-acre cold, clear oligotrophic lake in Sauk County, Wisconsin with a maximum depth of 38 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. The lake supports 2 documented fish species including Largemouth Bass and Walleye. Public access is available with 3 public boat landings. Compared to the 6 other monitored lakes in Sauk County, Dutch Hollow Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-23. Grade methodology: LakeGrade 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)
Crystal clear, you can see 15 ft down. Phosphorus level: 13.1 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 15 ft | Not graded |
| Phosphorus | 13.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Dutch Hollow Lake
Compare lakeside cabins, hotels, and vacation rentals near Dutch Hollow Lake in Sauk 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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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 38 ft |
| Surface Area | 172 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Hemlock Slough Sauk County ParkPublic
- AublePublic
- Dam SitePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Dutch Hollow 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 1998. 5 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.457 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.51 µg/L/yr | 7 |
Reservoir Info (USACE NID)
Dutch Hollow Lake is a man-made reservoir impounded by the Dutch Hollow Lake (completed 1971), built primarily for recreation on the Dutch Hollow Creek; earth-type dam, 60 ft tall and 750 ft long.
- Surface area
- 125 ac
- Normal storage
- 1,250 ac-ft
- Max storage
- 5,500 ac-ft
- Drainage area
- 5 sq mi
- Hazard class
- Low
- Owner
- Dutch Hollow Lake Property Owners' Association, Inc.
Source: USACE National Inventory of Dams, NID ID WI00193 · Operator website
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Dutch Hollow Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Wonewoc Wastewater Treatment FacilityWonewoc · 2.6 mi away · NPDES WI0029688Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #1 of 7 lakes in Sauk County
Nearby Lakes in Sauk County
Frequently asked questions about Dutch Hollow Lake
What is the water quality grade for Dutch Hollow Lake?
- Dutch Hollow Lake in Sauk County, Wisconsin has a water quality grade of B (Good). Water clarity: 15 ft visibility. Phosphorus: 13.1 µg/L. Maximum depth: 38 ft. Surface area: 172 acres.
Is Dutch Hollow Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Dutch Hollow Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Dutch Hollow Lake?
- Dutch Hollow Lake has a maximum depth of 38 feet. The lake covers 172 acres.
What fish are in Dutch Hollow Lake?
- Fish species found in Dutch Hollow Lake include Largemouth Bass, Walleye. Dutch Hollow Lake is located in Sauk County, Wisconsin.
Are there boat ramps on Dutch Hollow Lake?
- Dutch Hollow Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Hemlock Slough Sauk County Park, Auble, Dam Site. Public access is listed as yes.
Explore Dutch Hollow Lake across LakeGrade
3.7 mi away · cable-pulled, no boat wake
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State Parks Near Dutch Hollow Lake
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Where this data comes from
37 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_WQX37 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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
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