Hidden Valley Observatory
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|Organization||Black Hills Astronomical Society|
|Location||Rapid City, South Dakota|
Hidden Valley Observatory is an astronomical observatory owned and operated by Black Hills Astronomical Society. It is located just outside Rapid City, South Dakota (USA). It is named after the road on which it was built in the 1960s.
- "Hidden Valley Observatory Homepage". Black Hills Astronomical Society. Retrieved November 23, 2011.
- Hidden Valley Observatory Clear Sky Clock Forecasts of observing conditions.
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