The entrance fee to the historic area of the park is $10.00 for adults 16 years of age and older; children 15 and younger are free. This fee provides the visitor with a 7-day entrance permit to Fort McHenry National Monument and Historic Shrine.
Are you asking about time to see the fort? Cost of admission? Total weight in pounds?
The entrance fee for adults and kids over 16 is $10/each. There is no free for children under 15. Assuming your group is two adults over 16 and two children under 15, your entrance fees (before any taxes) would be $20. The entrance fees provide access for 7 days. Check the National Park Service website for the latest information on fees.
I'm not sure. I usually take the trails outside of the fort and the grounds are free.
Adults are $10 each, kids are free.
Ticket to visit inside the fort is $10 per person. But you can walk and visit around it, before the fence for free.
All the pricing information is on the website
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