Long story here. Back about a hundred years ago a guy started working out with us - his good friend James Menon was second at USATF outdoor nationals in the 10k and was working out with us at the time which is how we got introduced. The new guy could hang in all the hard workouts and on Sunday would run 10 miles in under 60 minutes. I asked him if he wanted to race XC for us in the fall, he responded "I can't, I've got to work". I asked what he did and he said he raced cars. His name is Townsend Bell who finished 4th at the 2009 Indy 500, 1 place behind Danica.
I bring this up because top race car drivers are incredible athletes with very high aerobic capacities. I'd be surprised if she didn't break 3:30 - I'll go on a limb and guess low 3:00 range.
Joe