Where is Avalanche Lake?

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

Avalanche Lake

Stillwater County, Montana58 acresView map Directions

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

Area

58 acres

Surface area

Shoreline

1.7 mi

Measured length

See the measurements Directions Where to stay

Avalanche Lake in Stillwater County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 58 acres.

Loading map…

Avalanche Lake is a 58-acre lake in Stillwater 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 Avalanche 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.

Get alerts for Avalanche Lake →

Water quality measurements for Avalanche Lake

These are the measurements Montana DEQ publishes for Avalanche 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 Avalanche Lake

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

Lake Details

Surface area

58 acres

Shoreline

1.7 mi

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

Stays via Stay22

Stays near Avalanche Lake

Compare lakeside cabins, hotels, and vacation rentals near Avalanche Lake in Stillwater 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 Avalanche Lake

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

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

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

Follow Avalanche Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Avalanche Lake

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

Nearby Lakes in Stillwater County

Storm Lakes1.1 miView →Island Lake2.8 miView →Mystic Lake3.2 miView →Lake Turgulse2.5 miView →Silver Lake2.9 miView →Froze-to-Death Lake—View →

Frequently asked questions about Avalanche Lake

Where is Avalanche Lake?: Avalanche Lake is a lake in Stillwater County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Avalanche Lake?: Avalanche Lake in Stillwater County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 58 acres.
Is Avalanche Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.