Where is Lake Sumner?

Lake Sumner is a lake in De Baca County, New Mexico. Its water-quality measurements are published by NMED and shown on this page as reported.

How deep is Lake Sumner?

Lake Sumner has a maximum depth of 65 feet and an average depth of 25 feet. The lake covers 1262 acres.

Are there boat ramps on Lake Sumner?

Lake Sumner has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Sumner Lake State Park, Sumner Lake State Park. Public access is listed as yes.

Can I fish at Lake Sumner?

Lake Sumner 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 New Mexico's fish and wildlife agency, so check its current regulations before you go.

Lake Sumner

De Baca County, New Mexico1,262 acresView map Directions

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

Max depth

65 ft

Bathymetric survey

Area

1,262 acres

Surface area

Shoreline

18.4 mi

Measured length

Impaired · Mercury
65 ft max depth
Public access

See the measurements Directions Where to stay

Lake Sumner in De Baca County, New Mexico has water-quality measurements published by NMED, shown here as reported. Maximum depth: 65 ft. Surface area: 1262 acres.

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Lake Sumner is a 1,262-acre lake in De Baca County, New Mexico with a maximum depth of 65 feet (25-foot average). Limited fish-species data available. Public access is available with 2 public boat landings.

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

What Lake Sumner is good for

From access and monitoring records, not editorial picks.

Boat launch2 documented ramps
Deep water65 ft surveyed max depth
Big water1,262 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake Sumner is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Lake Sumner is safe to swim in today is a call for the New Mexico Environment Department and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lake Sumner

These are the measurements NMED publishes for Lake Sumner, 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 Sumner

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

Lake Details

Max depth

65 ft

Average depth

25 ft

Surface area

1,262 acres

Shoreline

18.4 mi

Public access

Yes

Listed by NMED

Recreation & Access

Boat Landings

Yes

Public Access

Sumner Lake State ParkPublic
Sumner Lake State ParkPublic

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 Sumner

Compare lakeside cabins, hotels, and vacation rentals near Lake Sumner in De Baca County, New Mexico — 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 Sumner

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Fishing Lake Sumner

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

EPA Impairment Status

Lake Sumner is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit NM-2210_00 · Official waterbody report

Nearby Lakes in De Baca County

Sumner Lake Dam4.9 ft clear1.7 miView →Red Lake21.3 miView →Bonner Lake29.1 miView →The Old Dry Lake32.2 miView →Cooley Lake—View →Urton Lake—View →

Frequently asked questions about Lake Sumner

Where is Lake Sumner?: Lake Sumner is a lake in De Baca County, New Mexico. Its water-quality measurements are published by NMED and shown on this page as reported.
What is the water quality of Lake Sumner?: Lake Sumner in De Baca County, New Mexico has water-quality measurements published by NMED, shown here as reported. Maximum depth: 65 ft. Surface area: 1262 acres.
Is Lake Sumner safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Sumner is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Lake Sumner?: Lake Sumner has a maximum depth of 65 feet and an average depth of 25 feet. The lake covers 1262 acres.
Are there boat ramps on Lake Sumner?: Lake Sumner has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Sumner Lake State Park, Sumner Lake State Park. Public access is listed as yes.
Can I fish at Lake Sumner?: Lake Sumner 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 New Mexico's fish and wildlife agency, so check its current regulations before you go.