Where is Lake Shannon?

Lake Shannon is a lake in Skagit County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.

How deep is Lake Shannon?

Lake Shannon has a maximum depth of 280 feet and an average depth of 68.9 feet. The lake covers 1938 acres.

Lake Shannon

Skagit County, Washington1,938 acresView map Directions

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

Max depth

280 ft

Bathymetric survey

Area

1,938 acres

Surface area

Shoreline

22.4 mi

Measured length

280 ft max depth

See the measurements Directions Where to stay

Lake Shannon in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 280 ft. Surface area: 1938 acres.

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Lake Shannon is a 1,938-acre lake in Skagit County, Washington with a maximum depth of 280 feet (69-foot average).

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

What Lake Shannon is good for

From access and monitoring records, not editorial picks.

Deep water280 ft surveyed max depth
Big water1,938 acres

Swimming conditions

No reading

Not rated

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

Whether Lake Shannon is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lake Shannon

These are the measurements Washington Ecology publishes for Lake Shannon, 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 Shannon

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

Lake Details

Max depth

280 ft

Average depth

68.9 ft

Surface area

1,938 acres

Shoreline

22.4 mi

Stays via Stay22

Stays near Lake Shannon

Compare lakeside cabins, hotels, and vacation rentals near Lake Shannon in Skagit County, Washington — 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 Shannon

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Planning a whole trip? See where to stay at Washington’s top lakes →

Follow Lake Shannon’s readings

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Fishing Lake Shannon

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

Nearby Lakes in Skagit County

Lake Tyee2.6 miView →Grandy Lake4.5 miView →Spearhead Lake10.8 ft clear—View →Day Lake—View →Falls Lake—View →Lower Jordan Lake—View →

Frequently asked questions about Lake Shannon

Where is Lake Shannon?: Lake Shannon is a lake in Skagit County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Lake Shannon?: Lake Shannon in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 280 ft. Surface area: 1938 acres.
Is Lake Shannon safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Shannon?: Lake Shannon has a maximum depth of 280 feet and an average depth of 68.9 feet. The lake covers 1938 acres.