A US filly/mare ever won 3 Gr. 1s against the boys in 1 year?

[tector]

Originally Posted by Linny

Busher just missed in the SA Derby then later that year won the Arlington H, the Washington Park H (over Armed) and the Hollywood Derby. Of course there were no grades then but those were all very important events.
Gallorette won the Brooklyn, Met Mile and Bay Shore (then for older sprinters) all over the boys in one season.

I think your first example would likely qualify--those were all a big deal at the time, no doubt. I don't know enough about the former Bay Shore to judge whether it was a Gr. 1 equivalent.