Who is this lady?

[L Verge]

You are 100% correct, Betty, but you are going to have to share your yet undetermined prize with Eva, who got it the minute I posted the first hint. However, the two of us ganged up to keep it quiet and see if we could pester Yankee Joe.

For extra credit, what else of importance is shown in that photo? That was going to be my fourth clue. #3 was going to be "She was a confident horse woman."