Where is Lake Glenn Shoals?

Lake Glenn Shoals is a lake in Montgomery County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.

How deep is Lake Glenn Shoals?

Lake Glenn Shoals has a maximum depth of 30 feet and an average depth of 8 feet. The lake covers 1097 acres.

Are there boat ramps on Lake Glenn Shoals?

Lake Glenn Shoals has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Glenn Shoals Lake. Public access is listed as yes.

Can I fish at Lake Glenn Shoals?

Lake Glenn Shoals 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 Illinois's fish and wildlife agency, so check its current regulations before you go.

Lake Glenn Shoals

Montgomery County, Illinois1,097 acresView map Directions

No nutrient or algae sampling on record from Illinois EPA for this lake.

Max depth

30 ft

Bathymetric survey

Area

1,097 acres

Surface area

Shoreline

29.3 mi

Measured length

Impaired · Algal growth
30 ft max depth
Public access

See the measurements Directions Where to stay

Lake Glenn Shoals in Montgomery County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 30 ft. Surface area: 1097 acres.

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Lake Glenn Shoals is a 1,097-acre lake in Montgomery County, Illinois with a maximum depth of 30 feet (8-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Illinois EPA. Methodology: how these readings are compared.

What Lake Glenn Shoals is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water30 ft surveyed max depth
Big water1,097 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake Glenn Shoals is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.

Whether Lake Glenn Shoals is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lake Glenn Shoals

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

No clarity data. TSI undefined.

Ask about Lake Glenn Shoals

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

Lake Details

Max depth

30 ft

Average depth

8 ft

Surface area

1,097 acres

Shoreline

29.3 mi

Public access

Yes

Listed by Illinois EPA

Recreation & Access

Boat Landings

Yes

Public Access

Glenn Shoals LakePublic

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

Stays via Stay22

Stays near Lake Glenn Shoals

Compare lakeside cabins, hotels, and vacation rentals near Lake Glenn Shoals in Montgomery County, Illinois — 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 Lake Glenn Shoals

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Fishing Lake Glenn Shoals

→ Lake Glenn Shoals fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Lake Glenn Shoals is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthMercuryNutrients (phosphorus, nitrogen)Turbidity

Designated uses not supporting: Fish consumption, Other.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit IL_ROL · Official waterbody report

Nearby Lakes in Montgomery County

Glenn Shoals Lake1 ft clear · Hypereutrophic1 miView →Lake Hillsboro3.7 miView →Lou Yaeger Lake1.8 ft clear · Hypereutrophic7 miView →Lake Lou Yaeger7 miView →Fivemile Lake8.7 miView →Coffeen Lake12.5 miView →

Frequently asked questions about Lake Glenn Shoals

Where is Lake Glenn Shoals?: Lake Glenn Shoals is a lake in Montgomery County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Lake Glenn Shoals?: Lake Glenn Shoals in Montgomery County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 30 ft. Surface area: 1097 acres.
Is Lake Glenn Shoals safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Glenn Shoals is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
How deep is Lake Glenn Shoals?: Lake Glenn Shoals has a maximum depth of 30 feet and an average depth of 8 feet. The lake covers 1097 acres.
Are there boat ramps on Lake Glenn Shoals?: Lake Glenn Shoals has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Glenn Shoals Lake. Public access is listed as yes.
Can I fish at Lake Glenn Shoals?: Lake Glenn Shoals 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 Illinois's fish and wildlife agency, so check its current regulations before you go.