Where is Hidden Lake?

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

How deep is Hidden Lake?

Hidden Lake has a maximum depth of 72 feet. The lake covers 148 acres.

Hidden Lake

Madison County, Montana148 acresView map Directions

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

Max depth

72 ft

Bathymetric survey

Area

148 acres

Surface area

Shoreline

2.9 mi

Measured length

72 ft max depth

See the measurements Directions Where to stay

Hidden Lake in Madison County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 72 ft. Surface area: 148 acres.

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Hidden Lake is a 148-acre lake in Madison County, Montana with a maximum depth of 72 feet.

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

What Hidden Lake is good for

From access and monitoring records, not editorial picks.

Deep water72 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 Hidden 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 Hidden Lake →

Water quality measurements for Hidden Lake

These are the measurements Montana DEQ publishes for Hidden 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 Hidden Lake

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

Lake Details

Max depth

72 ft

Surface area

148 acres

Shoreline

2.9 mi

Stays via Stay22

Stays near Hidden Lake

Compare lakeside cabins, hotels, and vacation rentals near Hidden Lake in Madison 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 Hidden 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 Hidden Lake’s readings

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Fishing Hidden Lake

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

Nearby Lakes in Madison County

Cliff Lake4.3 miView →Wade Lake6.6 miView →Earthquake Lake—View →Cedar Lake—View →Ennis Lake—View →Ruby River Reservoir—View →

Frequently asked questions about Hidden Lake

Where is Hidden Lake?: Hidden Lake is a lake in Madison County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Hidden Lake?: Hidden Lake in Madison County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 72 ft. Surface area: 148 acres.
Is Hidden Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Hidden Lake?: Hidden Lake has a maximum depth of 72 feet. The lake covers 148 acres.