Donna Mims prepares for the off in her MGB December 1964, no details of circuit unfortunately…
She was a prominent driver and character in the US and was the first woman to win an SCCA title in 1963 in an Austin Healey Sprite. Click here for a short article on the lady;
http://www.autoblog.com/2009/10/14/donna-mae-mims-first-female-scca-winner-and-cannonball-run-vet/
Credit…
Bill Ray
Racers in 1966- Anita (sister of F1 driver Trevor) Taylor, Donna Mae Mims and future Indy 500 competitor Janet Guthrie. Mims, Guthrie and Suzy Dietrich drove the #80 Sunbeam Alpine to 32nd in the Daytona 24 Hours (speedqueens)
Finito…
primotipo... 
Sunbeam Alpine #80 at Daytona 24 Hours, 6.2.1966 , Donna Mae Mims / Janet Guthrie / Suzy Dietrich Entrant: Autosport, Finish Result 32nd, Source: Racingsportscars.com (http://www.racingsportscars.com/driver/results/Donna%20Mae-Mims-USA.html)
Legend John,
I had no idea where to start with that one! I have updated the caption accordingly.
Maek
That does look like Suzy on the left… https://en.wikipedia.org/wiki/Suzy_Dietrich