Old Man Lake
Idaho County, Idaho46 acresView mapDirections
No nutrient or algae sampling on record from Idaho DEQ for this lake.
Old Man Lake in Idaho County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 46 acres.
Old Man Lake is a 46-acre lake in Idaho County, Idaho.
Source: EPA Water Quality Portal sampling records, IDEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Old Man Lake is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Old Man Lake
These are the measurements Idaho DEQ publishes for Old Man 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 Old Man Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
46 acres
Shoreline
1.6 mi
No bathymetric survey has been published for Old Man Lake, so its depth is not documented here.
Stays via Stay22
Stays near Old Man Lake
Compare lakeside cabins, hotels, and vacation rentals near Old Man Lake in Idaho County, Idaho — 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 Old Man 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 Idaho’s top lakes →
Follow Old Man Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Old Man Lake
Nearby Lakes in Idaho County
Frequently asked questions about Old Man Lake
Where is Old Man Lake?
- Old Man Lake is a lake in Idaho County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Old Man Lake?
- Old Man Lake in Idaho County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 46 acres.
Is Old Man Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Old Man Lake across LakeQuality
More lakes in Idaho
Other Lakes in Idaho
Where this data comes from
Measurements for Old Man Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.