Where is Sidie Hollow Lake?

Sidie Hollow Lake is a lake in Vernon County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

How deep is Sidie Hollow Lake?

Sidie Hollow Lake has a maximum depth of 22 feet. The lake covers 35 acres.

What fish are in Sidie Hollow Lake?

Fish species found in Sidie Hollow Lake include Panfish, Largemouth Bass, Trout. Sidie Hollow Lake is located in Vernon County, Wisconsin.

Are there boat ramps on Sidie Hollow Lake?

Sidie Hollow Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sidie Hollow County Park. Public access is listed as yes.

Can I fish at Sidie Hollow Lake?

Sidie Hollow Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.

Sidie Hollow Lake

Vernon County, Wisconsin35 acresView map Directions

Wisconsin DNR publishes the water-quality measurements for Sidie Hollow Lake. Here is what has been measured.

Clarity

12 ft

Typical for Wisconsin

Secchi · sampled 2022

Max depth

22 ft

Bathymetric survey

Area

35 acres

Surface area

Curly-Leaf Pondweed
22 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Sidie Hollow Lake in Vernon County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Maximum depth: 22 ft. Surface area: 35 acres.

Wisconsin DNR rates Panfish and Largemouth Bass as abundant on Sidie Hollow Lake. DNR survey details →

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Sidie Hollow Lake is a 35-acre lake in Vernon County, Wisconsin with a maximum depth of 22 feet. Overall water quality is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Trout. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-07-01. Methodology: how these readings are compared.

Sidie Hollow Lake covers about 35 acres in Vernon County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Sidie Hollow Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.

What Sidie Hollow Lake is good for

From access and monitoring records, not editorial picks.

Clear water12 ft of visibility
Boat launch1 documented ramp
Fishing3 species recorded

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Sidie Hollow Lake 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.

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Water quality measurements for Sidie Hollow Lake

These are the measurements Wisconsin DNR publishes for Sidie Hollow Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Good clarity, visible to about 12 ft. TSI 41.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	12ft	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.	41	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Sidie Hollow Lake

Answers come straight from the public measurements and survey records on this page.

DNR fisheries survey

Wisconsin DNR rates Panfish and Largemouth Bass as abundant on Sidie Hollow Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Sidie Hollow Lake’s water-quality measurements separately, and the water-quality trend over 2 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. 4 stations on file (most recent sample 2022).

Fish Species (DNR-rated)

Panfish(Abundant)Largemouth Bass(Abundant)Trout(Common)

Contour map (PDF) →Full WI DNR LakePage →Water quality stations →

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Sidie Hollow Lake covering fish populations, stocking, water quality, and management. 1 report on file.

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

2024
Sidie Hollow Lake fishery survey, 2024
Fisheries Survey · WI DNR · 2024 (PDF)

Lake Details

Max depth

22 ft

Surface area

35 acres

Public access

Yes

Listed by Wisconsin DNR

Lake Size & Watershed

Watershed (drainage) area

4 sq mi

HydroLAKES / HydroSHEDS

Shoreline

1.7 mi

HydroLAKES / HydroSHEDS

Elevation

922 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).

Recreation & Access

Boat Landings

Yes

Public Access

Sidie Hollow County ParkPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Stays via Stay22

Stays near Sidie Hollow Lake

Compare lakeside cabins, hotels, and vacation rentals near Sidie Hollow Lake in Vernon 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 Sidie Hollow Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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 →

Follow Sidie Hollow Lake’s readings

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Fish Species

Panfish Largemouth Bass Trout

Click a species to see every lake where it is documented.

Fishing Sidie 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.

Curly-Leaf Pondweed

Water quality readings over time

2 seasons of samples on record (2020–2022). Calling a direction takes at least 4 years of the same measurement.

Water clarity
Worsening
2 years

Reservoir Info (USACE NID)

Sidie Hollow Lake is a man-made reservoir impounded by the Bad Axe 33 (completed 1965), built primarily for flood risk reduction on the TR SOUTH FORK BAD AXE; earth-type dam, 50 ft tall and 765 ft long.

Surface area: 78 ac
Normal storage: 417 ac-ft
Max storage: 1,420 ac-ft
Drainage area: 7.1 sq mi
Hazard class: Low
Owner: Vernon County

All listed purposes: Flood Risk Reduction;Recreation.

Source: USACE National Inventory of Dams, NID ID WI00414 · Operator website

Regulated Pollution Sources Nearby

1 EPA-permitted facility operate within about 5 miles of Sidie Hollow Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.

Viroqua Wastewater Treatment Facility
Viroqua · 3.9 mi away · NPDES WI0021920
Recent 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.

Nearby Lakes in Vernon County

Waller Lakes—View →Field Veterans Memorial Lake—View →Unnamed Lake1.2 ft clear—View →Lake Winneshiek—View →Neshonoc Lake—View →Neshonoc Lake0.4 ft clear—View →

Frequently asked questions about Sidie Hollow Lake

Where is Sidie Hollow Lake?: Sidie Hollow Lake is a lake in Vernon County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Sidie Hollow Lake?: Sidie Hollow Lake in Vernon County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Maximum depth: 22 ft. Surface area: 35 acres.
Is Sidie Hollow Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Sidie Hollow Lake?: Sidie Hollow Lake has a maximum depth of 22 feet. The lake covers 35 acres.
What fish are in Sidie Hollow Lake?: Fish species found in Sidie Hollow Lake include Panfish, Largemouth Bass, Trout. Sidie Hollow Lake is located in Vernon County, Wisconsin.
What did the DNR fisheries survey find at Sidie Hollow Lake?: Wisconsin DNR rates Panfish and Largemouth Bass as abundant on Sidie Hollow Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Sidie Hollow Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Sidie Hollow Lake?: Sidie Hollow Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sidie Hollow County Park. Public access is listed as yes.
Can I fish at Sidie Hollow Lake?: Sidie Hollow Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.

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State Parks Near Sidie Hollow Lake

Wildcat Mountain State Park

State Park · 22.8 mi

Other Lakes in Wisconsin

Unnamed Lake

Crawford County · 1.2 ft

Lake Winneshiek

Crawford County · Measured

Neshonoc Lake

La Crosse County · Measured

Neshonoc Lake

La Crosse County · 0.4 ft

Perch Lake

Monroe County · Measured

Lower Lake

Richland County · Measured

Mesotrophic Lakes in Wisconsin

Robinson Pond Fawn Lake Big Roche A Cri Lake Arrowhead Lake

Where this data comes from

3 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX3 samples · 2020–2022

Monitoring station identifiers (1)

WIDNR_WQX-633129

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

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