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

Are there campgrounds on Long Pond?

Long Pond has 1 public campground from USGS The National Map within 5 km, including Duck Harbor Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Long Pond

Knox County, Maine63 acresView map Directions

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

Area

63 acres

Surface area

See the measurements Directions Where to stay

Long Pond in Knox County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Surface area: 63 acres.

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Long Pond is a 63-acre lake in Knox County, Maine.

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

What Long Pond is good for

From access and monitoring records, not editorial picks.

Camping1 public campground nearby

Swimming conditions

No reading

Not rated

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

Whether Long Pond 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 Long Pond

These are the measurements Maine DEP publishes for Long Pond, 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 Pond

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

Lake Details

Surface area

63 acres

No bathymetric survey has been published for Long Pond, so its depth is not documented here.

Recreation & Access

Campgrounds

Public campgrounds near Long Pond

Duck Harbor Campground3.5 kmReserve

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Long Pond

Compare lakeside cabins, hotels, and vacation rentals near Long Pond in Knox 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.

Top-rated places to stay near Long Pond

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.

Follow Long Pond’s readings

Email me when new measurements post for this lake. Updates stay free.

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Fishing Long Pond

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

Nearby Lakes in Knox County

Carvers Pond10.7 miView →Old Harbor Pond12 miView →Fresh Pond14.5 miView →Lilly Pond—View →Chickawaukie Pond—View →Maces Pond—View →

Frequently asked questions about Long Pond

Where is Long Pond?: Long Pond is a lake in Knox County, Maine. Its water-quality measurements are published by Maine DEP and shown on this page as reported.
What is the water quality of Long Pond?: Long Pond in Knox County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Surface area: 63 acres.
Is Long Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Long Pond?: Long Pond has 1 public campground from USGS The National Map within 5 km, including Duck Harbor Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.