The new world's record in the marathon (men's) is now 2:02:57, just set in Berlin this weekend.
Wanna feel like a wimp? This is 4:41 pace, people!
I've blogged about this before, but some years back I was running laps overnight at an American Cancer Society's Relay for Life. I had decided in advance to run 100 laps, and so I executed that plan. I ran well and was relatively fresh when I hit my 100 lap goal, which equated to 25 miles.
I wasn't spent or burnt out, I simply had no interest or desire to add another 1.2 miles so I could call it a marathon. I suppose that was the moment when I truly became an Ultrarunner.