Where is Long Slough?

Long Slough is a lake in Yukon-Koyukuk County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.

How deep is Long Slough?

No published bathymetric survey covers Long Slough, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 16 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 44 acres.

Long Slough

Yukon-Koyukuk County, Alaska44 acresView map Directions

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

Mean depth

~16 ft est.

HydroLAKES model

Area

44 acres

Surface area

16 ft mean depth (modelled)

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Long Slough in Yukon-Koyukuk County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 44 acres.

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Long Slough is a 44-acre lake in Yukon-Koyukuk County, Alaska with an estimated average depth of about 16 feet.

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

Swimming conditions

No reading

Not rated

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

Whether Long Slough is safe to swim in today is a call for the Alaska Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Long Slough

These are the measurements Alaska DEC publishes for Long Slough, 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 Slough

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

Lake Details

Mean depth

~16 ft est.

Surface area

44 acres

Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Alaska has not published bathymetry for Long Slough.

Lake Size & Watershed

Watershed (drainage) area

580 sq mi

HydroLAKES / HydroSHEDS

Mean depth

~16 ft est.

Modelled from terrain, not sounded

Shoreline

4.1 mi

HydroLAKES / HydroSHEDS

Elevation

354 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.

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Stays near Long Slough

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Fishing Long Slough

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

Nearby Lakes in Yukon-Koyukuk County

Olaf Lake0.8 miView →Jefferson Lake0.9 miView →Victor Lake1.2 miView →Long Lakes1.9 miView →Loon Lakes—View →Shoeheel Lake—View →

Frequently asked questions about Long Slough

Where is Long Slough?: Long Slough is a lake in Yukon-Koyukuk County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of Long Slough?: Long Slough in Yukon-Koyukuk County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 44 acres.
Is Long Slough safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long Slough?: No published bathymetric survey covers Long Slough, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 16 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 44 acres.