Mormon Island, human settlement in United States of America
Mormon Island is a former settlement in California that developed during the Gold Rush and occupied an area that was later flooded. The site is now submerged beneath water, but the location is preserved as a state historical landmark.
Mormon Island was established in the 1840s as a mining community during California's Gold Rush. The settlement was flooded in the 1970s when a dam was built, submerging the site beneath water.
The site is no longer accessible today as it lies beneath the water of a reservoir. Visitors can view the area from the shoreline or explore the history through nearby museums and memorials.
Though the settlement lies underwater, remnants can sometimes become visible during low water levels. This makes the location a rare example of a lost community swallowed by 20th-century American dam development.
Location: California
GPS coordinates: 38.70350,-121.11740
Latest update: December 15, 2025 13:27
American River
3.6 km
Folsom Lake
2.4 km
U.S. Route 50 in California
7.3 km
Folsom Dam
3.5 km
Auburn Dam
20.4 km
Folsom Powerhouse State Historic Park
5.7 km
SeaQuest Folsom
5.9 km
Folsom City Zoo Sanctuary
4.8 km
Roseville Golfland Sunsplash
13.8 km
Fair Oaks Bridge
14.9 km
Pine Hill Ecological Reserve
11.1 km
All-American Speedway
16.2 km
Griffith Quarry
16.9 km
Carpenter Hill
6.2 km
Maidu Museum & Historic Site
11.8 km
Jensen Botanical Gardens
19.1 km
American River Grange Hall No. 172
17.9 km
Cohn House
5.7 km
Faith Episcopal Church
10.7 km
Rusch Botanical Gardens
15.8 km
Sacramento Children's Museum
19.3 km
Chaparral Gardens
19.8 km
Alden Memorial Bridge
5.5 km
Griffith Quarry Park & Museum
16.7 km
Historic Opera House
5.9 km
Oregon Bar
18.6 km
Rainbow Bridge
5.6 km
Folsom Lake Crossing
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