Earthquake Lake
Overview
About This Attraction
Turquoise water runs along a six-mile-long lake, set against a broad landslide scar on Sheep Mountain. The lake formed when a massive rock avalanche dammed the Madison River during the 1959 Hebgen Lake earthquake. It stands as a stark, real-world example of tectonic forces reshaping the landscape in moments.
Quick Facts
Geological Formation
6,391 ft
Drive-up view; some paths accessible
Main Features
Natural dam formed by a landslide; 6 miles long lake; landslide scar and Madison River dam
What You'll See
Landslide debris visible along the scar; the lake on the Madison River; overlooks; surrounding mountains
What Makes It Special
One of the most dramatic quake-triggered dam formations; formed in 1959 during the Hebgen Lake earthquake; 28 lives lost
Best Time to Visit
Summer (late Mayβmid-September) when the Earthquake Lake Visitor Center is open and roads are clear; sunrise and sunset yield the best light.
Safety Considerations
Gravity: rockfall risk from the landslide scar; Temperature: cold water risk for hypothermia; Wind: afternoon gusts; Geological instability: monitor for ongoing hazards; Bear spray recommended; sturdy footwear; stay on marked paths
Visitor Tips
- Look for the broad landslide scar along Sheep Mountain from the visitor center overlooks.
- The Madison River water is bitterly coldβdress in layers and be prepared for wind.
- Bear spray is recommended in this wildlife-rich area.
- Stay on designated paths and overlooks; rockfall remains a risk near the scar.
- Parking can fill on peak days; plan accordingly.
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