Where is Lake Marshall?

Lake Marshall is a lake in Missoula County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.

How deep is Lake Marshall?

Lake Marshall has a maximum depth of 55 feet. The lake covers 80 acres.

Lake Marshall

Missoula County, Montana80 acresView map Directions

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

Max depth

55 ft

Bathymetric survey

Area

80 acres

Surface area

Shoreline

1.9 mi

Measured length

55 ft max depth

See the measurements Directions Where to stay

Lake Marshall in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 55 ft. Surface area: 80 acres.

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Lake Marshall is a 80-acre lake in Missoula County, Montana with a maximum depth of 55 feet.

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

What Lake Marshall is good for

From access and monitoring records, not editorial picks.

Deep water55 ft surveyed max depth

Swimming conditions

No reading

Not rated

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

Whether Lake Marshall is safe to swim in today is a call for the Montana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Lake Marshall →

Water quality measurements for Lake Marshall

These are the measurements Montana DEQ publishes for Lake Marshall, 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 Marshall

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

Lake Details

Max depth

55 ft

Surface area

80 acres

Shoreline

1.9 mi

Stays via Stay22

Stays near Lake Marshall

Compare lakeside cabins, hotels, and vacation rentals near Lake Marshall in Missoula County, Montana — 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 Marshall

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Follow Lake Marshall’s readings

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Fishing Lake Marshall

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

Nearby Lakes in Missoula County

Lake Alva Mid-Lake Deep21.6 ft clear · Oligotrophic3.7 miView →Alva LakeOligotrophic3.8 miView →Rainy Lake Deep18.9 ft clear—View →Lake Inez Off Rana Drive Upper W Side of Lake3.8 miView →Lake Inez North Hole17.4 ft clear3.9 miView →Lake Inez Off Helms Rd S End of Lake4.1 miView →

Frequently asked questions about Lake Marshall

Where is Lake Marshall?: Lake Marshall is a lake in Missoula County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Lake Marshall?: Lake Marshall in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 55 ft. Surface area: 80 acres.
Is Lake Marshall safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Marshall?: Lake Marshall has a maximum depth of 55 feet. The lake covers 80 acres.