Where is Upper Mahoney Lake?

Upper Mahoney Lake is a lake in Ketchikan Gateway County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.

How deep is Upper Mahoney Lake?

No published bathymetric survey covers Upper Mahoney Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 27 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 82 acres.

Upper Mahoney Lake

Ketchikan Gateway County, Alaska82 acresView map Directions

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

Mean depth

~27 ft est.

HydroLAKES model

Area

82 acres

Surface area

27 ft mean depth (modelled)

See the measurements Directions Where to stay

Upper Mahoney Lake in Ketchikan Gateway County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 82 acres.

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Upper Mahoney Lake is a 82-acre lake in Ketchikan Gateway County, Alaska with an estimated average depth of about 27 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 Upper Mahoney Lake 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 Upper Mahoney Lake

These are the measurements Alaska DEC publishes for Upper Mahoney Lake, 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 Upper Mahoney Lake

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

Lake Details

Mean depth

~27 ft est.

Surface area

82 acres

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

Lake Size & Watershed

Watershed (drainage) area

1 sq mi

HydroLAKES / HydroSHEDS

Mean depth

~27 ft est.

Modelled from terrain, not sounded

Shoreline

1.7 mi

HydroLAKES / HydroSHEDS

Elevation

1,952 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 Upper Mahoney Lake

Compare lakeside cabins, hotels, and vacation rentals near Upper Mahoney Lake in Ketchikan Gateway County, Alaska — 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.

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Fishing Upper Mahoney Lake

→ Upper Mahoney Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Ketchikan Gateway County

Mahoney Lake1.5 miView →Upper Silvis Lake2.5 miView →Lower Silvis Lake2.7 miView →Upper Ketchikan Lake3.1 miView →Whitman Lake—View →Harriet Hunt Lake—View →

Frequently asked questions about Upper Mahoney Lake

Where is Upper Mahoney Lake?: Upper Mahoney Lake is a lake in Ketchikan Gateway County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of Upper Mahoney Lake?: Upper Mahoney Lake in Ketchikan Gateway County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 82 acres.
Is Upper Mahoney Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Upper Mahoney Lake?: No published bathymetric survey covers Upper Mahoney Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 27 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 82 acres.