Mission Reservoir
Lake County, Montana274 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Mission Reservoir in Lake County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 274 acres.
Mission Reservoir is a 274-acre lake in Lake County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ. 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 Mission Reservoir 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.
Water quality measurements for Mission Reservoir
These are the measurements Montana DEQ publishes for Mission Reservoir, 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 Mission Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
274 acres
Shoreline
4 mi
No bathymetric survey has been published for Mission Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Mission Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Mission Reservoir in Lake 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 Mission Reservoir
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 Mission Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Mission Reservoir
Nearby Lakes in Lake County
Frequently asked questions about Mission Reservoir
Where is Mission Reservoir?
- Mission Reservoir is a lake in Lake County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Mission Reservoir?
- Mission Reservoir in Lake County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 274 acres.
Is Mission Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Mission Reservoir across LakeQuality
More lakes in Montana
Other Lakes in Montana
Where this data comes from
Measurements for Mission Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.