Loon Lake is a lake in Steuben County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.

How deep is Loon Lake?

Loon Lake has a maximum depth of 18 feet and an average depth of 4.9 feet. The lake covers 131 acres.

Are there boat ramps on Loon Lake?

Loon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pigeon River Fish & Wildlife Area. Public access is listed as yes.

Can I fish at Loon Lake?

Loon 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 Indiana's fish and wildlife agency, so check its current regulations before you go.

Loon Lake

Steuben County, Indiana131 acresView map Directions

IDEM publishes the water-quality measurements for Loon Lake. Here is what has been measured.

Phosphorus

22.9 µg/L

Less phosphorus than most

Measured by IDEM

Chlorophyll-a

7.7 µg/L

Typical for Indiana

Measured by IDEM

Max depth

18 ft

Bathymetric survey

Area

131 acres

Surface area

Shoreline

3.3 mi

Measured length

18 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Loon Lake in Steuben County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 22.9 µg/L. Chlorophyll-a (algae): 7.7 µg/L. Maximum depth: 18 ft. Surface area: 131 acres.

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Loon Lake is a 131-acre lake in Steuben County, Indiana with a maximum depth of 18 feet (5-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2024-07-01. Methodology: how these readings are compared.

What Loon Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Limited data

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

Whether Loon Lake is safe to swim in today is a call for the Indiana Department of Environmental Management and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Loon Lake

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

No clarity data. Phosphorus 22.9 µg/L. Chlorophyll-a 7.7 µg/L.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	22.9µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	7.7µg/L	Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water.

Ask about Loon Lake

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

Lake Details

Max depth

18 ft

Average depth

4.9 ft

Surface area

131 acres

Shoreline

3.3 mi

Public access

Yes

Listed by IDEM

Recreation & Access

Boat Landings

Yes

Public Access

Pigeon River Fish & Wildlife AreaPublic

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

Stays via Stay22

Stays near Loon Lake

Compare lakeside cabins, hotels, and vacation rentals near Loon Lake in Steuben County, Indiana — 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 Loon Lake

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Fishing Loon Lake

→ Loon Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Steuben County

Mud Lake0.9 miView →Silver Lake1.7 miView →Cheeseboro Lake1.6 miView →Fox Lake2.1 miView →Crooked LakeMesotrophic—View →Grass Lake2 miView →

Frequently asked questions about Loon Lake

Where is Loon Lake?: Loon Lake is a lake in Steuben County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Loon Lake?: Loon Lake in Steuben County, Indiana has water-quality measurements published by IDEM, shown here as reported. Phosphorus: 22.9 µg/L. Chlorophyll-a (algae): 7.7 µg/L. Maximum depth: 18 ft. Surface area: 131 acres.
Is Loon Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Loon Lake?: Loon Lake has a maximum depth of 18 feet and an average depth of 4.9 feet. The lake covers 131 acres.
Are there boat ramps on Loon Lake?: Loon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pigeon River Fish & Wildlife Area. Public access is listed as yes.
Can I fish at Loon Lake?: Loon 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 Indiana's fish and wildlife agency, so check its current regulations before you go.