8, including two Bostons (both official). However, since my last was nearly a quarter-century ago and I was well into the master's category at the time, I doubt there will be many more in my future.
Best wishes for Richmond, and let us know how you did. I'd love to participate in a short fun-run that's part of another Do, but I don't think I'd fly anywhere for a Do that's centered on a marathon these days.