Discover America's Original Fort Knox - Prospect, Maine
Fort Knox and the Penobscot Narrows Observatory
is OPEN for the Season!
The Fort Knox Historic Site features one of the best-preserved examples of coastal defense fortifications constructed in the mid-1800s. It is America's first fort named after Major General Henry Knox. The PNO is the tallest bridge observatory open to the public in the world. Visitors to the observatory ride Maine's fastest elevator up 420' feet for breathtaking 360-degree views of the Penobscot Bay area.
Please enjoy the slideshow below for a taste of what Fort Knox and the PNO have to offer!
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May 1 thru June 30 - Fort Knox Historic Site* and Observatory open from 9 am to 5 pm - Fort itself remains open until 6 pm
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July 1 thru August 31 - Fort Knox Historic Site* and Observatory open from 9 am to 6 pm - Fort itself remains open until 7 pm
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September 1 thru October 31 - Fort Knox Historic Site* and Observatory open from 9 am to 5 pm - Fort itself remains open until 6 pm or sunset (whichever is earlier)
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November 1 thru April 30 - Fort Knox Historic Site* and Observatory are closed. However, the park grounds are open 9 am to sunset.
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Park grounds are open from 9 am to sunset — today, tomorrow, and every day - Year-round (weather depending)! ​
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*Fort Knox Historic Site includes the Fort, Observatory and amenities like the gift shop & guest education/museum center.
Please visit the Events Pages for dates and details of additional activities like Civil War Days!
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Download your FREE Fort Knox Historic Site app!
QR code for Apple store
QR code for Google Play
