As I was closing in on the finish line, I started thinking: it's safe to slow down, since it's very unlikely that anyone in your age group is right behind you.
That was fatigue talking. My critical brain was still functioning, slightly, and it countered: you know no such thing!
So I managed to crank it up a little.
It turns out there were 2 guys in my age group, breathing down my neck. Our finishing times were:
6 John Enright 55 M-55-59 1:12:21We had a competitive race
7 Chuck Wolske 55 M-55-59 1:12:27
8 Randall Thomure 59 M-55-59 1:12:30
for the honor of 6th place.