Not sure but I think about 1957 and it was reopened after a remodel with 95 new exhibits in 2006.
How long does the Loop take?
I want to recant my last question. In further reading I learned that the Big Foot overlook at the Badlands is named for the Lakota known as a peacekeeper. I apologize for jumping to conclusions about the name. I guess in my defense, my husband is a big fan of the supossed sasquash by the same name and I do not know all the history of Wounded Knee. I will tomottow, when we go to the Wounded Knee museum in Wall before we hit the Loop. Again, my apologies.