Earthquake Lake
Madison County, Montana614 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
- 120 ft max depth
Earthquake Lake in Madison County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 120 ft. Surface area: 614 acres.
Earthquake Lake is a 614-acre lake in Madison County, Montana with a maximum depth of 120 feet.
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
What Earthquake Lake is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
- Deep water120 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Earthquake 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.
Water quality measurements for Earthquake Lake
These are the measurements Montana DEQ publishes for Earthquake 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 Earthquake Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
120 ft
Surface area
614 acres
Shoreline
9.5 mi
Recreation & Access
Public campgrounds near Earthquake Lake
- Beaver Creek Campground3.6 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Earthquake Lake
Compare lakeside cabins, hotels, and vacation rentals near Earthquake 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 Earthquake Lake
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Nearby Lakes in Madison County
Frequently asked questions about Earthquake Lake
Where is Earthquake Lake?
- Earthquake 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 Earthquake Lake?
- Earthquake Lake in Madison County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 120 ft. Surface area: 614 acres.
Is Earthquake Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Earthquake Lake?
- Earthquake Lake has a maximum depth of 120 feet. The lake covers 614 acres.
Are there campgrounds on Earthquake Lake?
- Earthquake Lake has 1 public campground from USGS The National Map within 5 km, including Beaver Creek Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
Measurements for Earthquake Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles