Where is Allagash Lake?

Allagash Lake is a lake in Piscataquis County, Maine. Its water-quality measurements are published by Maine DEP and shown on this page as reported.

How deep is Allagash Lake?

Allagash Lake has a maximum depth of 89 feet and an average depth of 35 feet. The lake covers 4213 acres.

Allagash Lake

Piscataquis County, Maine4,213 acresView map Directions

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

Max depth

89 ft

Bathymetric survey

Area

4,213 acres

Surface area

Shoreline

20.8 mi

Measured length

89 ft max depth

See the measurements Directions Where to stay

Allagash Lake in Piscataquis County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 89 ft. Surface area: 4213 acres.

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Allagash Lake is a 4,213-acre lake in Piscataquis County, Maine with a maximum depth of 89 feet (35-foot average).

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Allagash Lake is good for

From access and monitoring records, not editorial picks.

Deep water89 ft surveyed max depth
Big water4,213 acres

Swimming conditions

No reading

Not rated

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

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

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Water quality measurements for Allagash Lake

These are the measurements Maine DEP publishes for Allagash 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 Allagash Lake

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

Lake Details

Max depth

89 ft

Average depth

35 ft

Surface area

4,213 acres

Shoreline

20.8 mi

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

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Stays near Allagash Lake

Compare lakeside cabins, hotels, and vacation rentals near Allagash Lake in Piscataquis County, Maine — 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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Fishing Allagash Lake

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

Nearby Lakes in Piscataquis County

Upper Ellis Pond2.7 miView →Lower Ellis Pond3 miView →Johnson Pond2.8 miView →Second South Branch Russell Pond4.1 miView →Little Shallow Lake—View →First South Branch Russell Pond—View →

Frequently asked questions about Allagash Lake

Where is Allagash Lake?: Allagash Lake is a lake in Piscataquis County, Maine. Its water-quality measurements are published by Maine DEP and shown on this page as reported.
What is the water quality of Allagash Lake?: Allagash Lake in Piscataquis County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 89 ft. Surface area: 4213 acres.
Is Allagash Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Allagash Lake?: Allagash Lake has a maximum depth of 89 feet and an average depth of 35 feet. The lake covers 4213 acres.