I'm not so sure the all girl/female tris are quite as unprecedented at a "major" track as people might think. Some years ago at Ft. Erie it seemed like more than half the colony was female, and they were some of the better riders there. And out west at the little fair meets sometimes it's almost all the riders. But it is a good story nonetheless, and if it gets Hawthorne in the news somehow, that's good too.
This appeared in Twitter 12 hours ago by the Permanently Disabled Jockey Fund:
History @ Hawthorne today? R9 all-female/all-bug rider trifecta R9. Well done, ladies!http://www.equibase.com/static/chart/pdf/HAW111713USA9.pdf