Long Lake is a lake in Alpena County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.

How deep is Long Lake?

Long Lake has a maximum depth of 25 feet and an average depth of 13 feet. The lake covers 5342 acres.

Are there boat ramps on Long Lake?

Long Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Long Lake Park, Mar-Ral Road. Public access is listed as yes.

Can I fish at Long Lake?

Long Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.

Long Lake

Alpena County, Michigan5,342 acresView map Directions

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

Max depth

25 ft

Bathymetric survey

Area

5,342 acres

Surface area

Shoreline

1.7 mi

Measured length

25 ft max depth
Public access

See the measurements Directions Where to stay

Long Lake in Alpena County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 25 ft. Surface area: 5342 acres.

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Water clarity at Long Lake

Moderate clarity. Across summers from 2018 to 2023, Long Lake averaged 2.4 m (8 ft) of visibility down into the water, so visibility is middling in midsummer, which is ordinary for a productive inland lake. This lake sits close to the line between clarity classes, so treat the label as approximate and the depth reading as the real number.

Nobody has taken a water sample here that we can find. Michigan's environmental agency measures clarity on lakes like this one from satellite images instead, which is why this page reports how clear the water is and no phosphorus or algae readings.

Clear is not the same as clean. A lake can be easy to see through and still carry high nutrient levels, and a naturally tea-stained lake can be perfectly healthy. The nutrient and algae readings on other lakes come from phosphorus and chlorophyll-a measured in a laboratory, and clarity alone cannot stand in for them.

The same satellite images put summer algae here at roughly 3.75 micrograms per litre. Estimating algae from orbit is far less exact than measuring clarity, so that figure is worth knowing and is not part of any rating.

Long Lake is a 5,342-acre lake in Alpena County, Michigan with a maximum depth of 25 feet (13-foot average). Limited fish-species data available. Public access is available with 2 public boat landings.

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

What Long Lake is good for

From access and monitoring records, not editorial picks.

Boat launch2 documented ramps
Big water5,342 acres

Swimming conditions

No reading

Not rated

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

Whether Long Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Long Lake

These are the measurements EGLE publishes for Long 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. TSI undefined.

Ask about Long Lake

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

Lake Details

Max depth

25 ft

Average depth

13 ft

Surface area

5,342 acres

Shoreline

1.7 mi

Public access

Yes

Listed by EGLE

Recreation & Access

Boat Landings

Yes

Public Access

Long Lake ParkPublic
Mar-Ral RoadPublic

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

Stays via Stay22

Stays near Long Lake

Compare lakeside cabins, hotels, and vacation rentals near Long Lake in Alpena County, Michigan — 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 Long Lake

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Follow Long Lake’s readings

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Fishing Long Lake

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

Nearby Lakes in Alpena County

Mindack Lake3.1 miView →Devils Lake4.5 miView →Middle Lake4.8 miView →Fourmile Pond—View →Lake Winyah—View →Ninth Street Pond—View →

Frequently asked questions about Long Lake

Where is Long Lake?: Long Lake is a lake in Alpena County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Long Lake?: Long Lake in Alpena County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 25 ft. Surface area: 5342 acres.
Is Long Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long Lake?: Long Lake has a maximum depth of 25 feet and an average depth of 13 feet. The lake covers 5342 acres.
Are there boat ramps on Long Lake?: Long Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Long Lake Park, Mar-Ral Road. Public access is listed as yes.
Can I fish at Long Lake?: Long Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.