Where is Lake Francis?

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

How deep is Lake Francis?

Lake Francis has a maximum depth of 82 feet and an average depth of 40 feet. The lake covers 1934 acres.

Are there boat ramps on Lake Francis?

Lake Francis has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Route 3. Public access is listed as yes.

Can I fish at Lake Francis?

Lake Francis 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.

Lake Francis

Coos County, New Hampshire1,934 acresView map Directions

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

Max depth

82 ft

Bathymetric survey

Area

1,934 acres

Surface area

Shoreline

16.1 mi

Measured length

Impaired · Mercury
82 ft max depth
Public access

See the measurements Directions Where to stay

Lake Francis in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 82 ft. Surface area: 1934 acres.

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Lake Francis is a 1,934-acre lake in Coos County, New Hampshire with a maximum depth of 82 feet (40-foot average). 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 Lake Francis is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water82 ft surveyed max depth
Big water1,934 acres

Swimming conditions

No reading

Not rated

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

Whether Lake Francis 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 Lake Francis

These are the measurements NHDES publishes for Lake Francis, 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 Francis

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

Lake Details

Max depth

82 ft

Average depth

40 ft

Surface area

1,934 acres

Shoreline

16.1 mi

Public access

Yes

Listed by NHDES

Recreation & Access

Boat Landings

Yes

Public Access

Route 3Public

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 Francis

Compare lakeside cabins, hotels, and vacation rentals near Lake Francis in Coos 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 Lake Francis

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Fishing Lake Francis

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

EPA Impairment Status

Lake Francis 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 NHLAK801010104-02 · Official waterbody report

Nearby Lakes in Coos County

Back Lake2.4 miView →Diamond Pond6.7 miView →Little Diamond Pond7 miView →First Connecticut Lake-Deep Spot5.9 miView →Round Pond7.2 miView →Mud Pond10.2 miView →

Frequently asked questions about Lake Francis

Where is Lake Francis?: Lake Francis is a lake in Coos County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Lake Francis?: Lake Francis in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 82 ft. Surface area: 1934 acres.
Is Lake Francis safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Francis is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Lake Francis?: Lake Francis has a maximum depth of 82 feet and an average depth of 40 feet. The lake covers 1934 acres.
Are there boat ramps on Lake Francis?: Lake Francis has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Route 3. Public access is listed as yes.
Can I fish at Lake Francis?: Lake Francis 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.