|Elevation||1,391 ft (424 m)|
|Time zone||Pacific (PST) (UTC-8)|
|• Summer (DST)||PDT (UTC-7)|
|GNIS feature ID||261237|
Helena is an unincorporated community in Trinity County, California, United States. Helena is located on the North Fork of the Trinity River 10 miles (16 km) west-northwest of Weaverville. The community was settled in 1851 as a mining camp. It was known as Bagdad, North Fork, and The Cove before its post office opened in 1891; the post office was named Helena after the postmaster's wife. The post office was later moved to North Fork.
- U.S. Geological Survey Geographic Names Information System: Helena, California
- Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Quill Driver Books. p. 75. ISBN 1-884995-14-4.
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