Where is Boulder Lake?

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

Boulder Lake

Missoula County, Montana109 acresView map Directions

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

Area

109 acres

Surface area

Shoreline

1.7 mi

Measured length

See the measurements Directions Where to stay

Boulder Lake in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 109 acres.

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Boulder Lake is a 109-acre lake in Missoula County, Montana.

Source: EPA Water Quality Portal sampling records, Montana DEQ. 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 Boulder Lake 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.

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Water quality measurements for Boulder Lake

These are the measurements Montana DEQ publishes for Boulder 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 Boulder Lake

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

Lake Details

Surface area

109 acres

Shoreline

1.7 mi

No bathymetric survey has been published for Boulder Lake, so its depth is not documented here.

Stays via Stay22

Stays near Boulder Lake

Compare lakeside cabins, hotels, and vacation rentals near Boulder Lake 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 Boulder Lake

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

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Follow Boulder Lake’s readings

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Fishing Boulder Lake

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

Nearby Lakes in Missoula County

Lake Sa-ol-Sooth4 miView →Big Lake4.6 miView →Lower Jocko Lake9.5 miView →Gray Wolf Lake14.6 miView →High Park Lake—View →Crystal Lake—View →

Frequently asked questions about Boulder Lake

Where is Boulder Lake?: Boulder Lake 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 Boulder Lake?: Boulder Lake in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 109 acres.
Is Boulder Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.