Long Pond is a lake in Grafton County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.

How deep is Long Pond?

Long Pond has a maximum depth of 5 feet. The lake covers 96 acres.

Are there boat ramps on Long Pond?

Long Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include White Mountain National Forest. Public access is listed as yes.

Can I fish at Long Pond?

Long Pond 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 New Hampshire's fish and wildlife agency, so check its current regulations before you go.

Long Pond

Grafton County, New Hampshire96 acresView map Directions

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

Max depth

5 ft

Bathymetric survey

Area

96 acres

Surface area

Shoreline

2.9 mi

Measured length

Impaired · Mercury
5 ft max depth
Public access

See the measurements Directions Where to stay

Long Pond in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 5 ft. Surface area: 96 acres.

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Long Pond is a 96-acre lake in Grafton County, New Hampshire with a maximum depth of 5 feet. Limited fish-species data available. Public access is available with 1 public boat landing.

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.

Boat launch1 documented ramp

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Long Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Long Pond is safe to swim in today is a call for the New Hampshire Department of Environmental Services 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 NHDES 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

Max depth

5 ft

Surface area

96 acres

Shoreline

2.9 mi

Public access

Yes

Listed by NHDES

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

Recreation & Access

Boat Landings

Yes

Public Access

White Mountain National ForestPublic

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

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Stays near Long Pond

Compare lakeside cabins, hotels, and vacation rentals near Long Pond in Grafton County, New Hampshire — 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

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Fishing Long Pond

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

EPA Impairment Status

Long Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

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

Source: EPA ATTAINS assessment unit NHLAK801030505-02 · Official waterbody report

Nearby Lakes in Grafton County

Oliverian Pond3.8 miView →Wachipauka Pond5.1 miView →South Mountain Lake-CoveOligotrophic5.5 miView →French Pond-Deep Spot5.1 miView →South Mountain Lake-Deep SpotMesotrophic5.6 miView →South Mountain Lake-Beach5.7 miView →

Frequently asked questions about Long Pond

Where is Long Pond?: Long Pond is a lake in Grafton County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Long Pond?: Long Pond in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 5 ft. Surface area: 96 acres.
Is Long Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Long Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Long Pond?: Long Pond has a maximum depth of 5 feet. The lake covers 96 acres.
Are there boat ramps on Long Pond?: Long Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include White Mountain National Forest. Public access is listed as yes.
Can I fish at Long Pond?: Long Pond 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 New Hampshire's fish and wildlife agency, so check its current regulations before you go.