A quick Google yields the following information : Admission Adults $20 ($18 for Seniors, AAA members, MTA cardholders, and active and retired U.S. Military) Youth $8 (ages 13-17) Children (12 and under) are FREE with a paying adult Members visit anytime for FREE!
It was reasonable. I believe $10/person. Well worth it!
It's part of the National Association of Reciprocal Museums, NARM. So if you have a museum membership with that benefit, you'll get free or discounted admission to a large number of museums, nationwide. Members in the area include The Mount, Edith Wharton's estate in Lenox , The Hope Museum and the Rockwell Museum in Stockbridge.
Very reasonable... Maybe $15 ??
Adults $20 ($18 for Seniors, AAA members, MTA cardholders, and active and retired U.S. Military) Youth $8 (ages 13-17) Children (12 and under) are FREE with a paying adult, courtesy of  Members visit anytime for FREE!
We bought a year's couple membership for $80 and have gone 4 times so far. Great!
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