Nearly. I snuck under 3:00 my first one. I was suitably cratered, but thought I could really buckle down and improve. My trajectory was as follows:
1. 2:59:23 White Rock
2. 3:07 San Antonio
3. DNF White Rock
4. 2:57:55 White Rock
5. 3:07 Boston
6. 3:09 Houston
7. 3:10:59 OK City
8. 3:18 Phoenix
I thought I'd always improve. Didn't happen. Now I'm too old to PR, but I still think around 3:10 is possible.