There is anecdotal evidence that Native Americans may have done FAs of Mt Rainier and The Grand Teton. I'd venture that MANY FAs were done by natives for various reasons.
Maybe - it would be interesting if there was a way to actually find out. I guess all there really is is Indian oral history (though maybe some stuff has been written down by early settlers and historians on Indian travels?), which can be both accurate and inaccurate - especially when trying to compare things from different cultures. I just don't see Indians spending lots of time in remote areas with harsh climates that are covered in snow 2/3 or the year.
marmot hunting
goat hunting