[gensym]

You have more time than you think, especially at the marathon distance. If you were looking for sub-3, then yeah, you’d better hurry, but 40s isn’t at all old for a sub-4 marathon, especially if you’re willing to put in the miles during training.

Males have to get to 65 years old before a 4-hour marathon will even qualify them for Boston.

[jfengel]

I didn't realize it was even that relaxed.

I'd wanted to qualify for Boston in my 20s, which at the time required a 3:10 marathon. It was just barely at the limit of possibility, if I had a perfect day, which I never did.

Then they dropped that limit to 3:05, and that might as well be on the far side of the moon. So, I never run Boston. Ah, well. That was a very stretchy stretch goal.