Notes
I've entered this in to give me a vaid-ish Half Marathon PR. I never raced a half when I was in peak shape, but this split in my PR 25k is representative.
There was a HM mark in the race, but I don't remember my split. The 25K pace translates to 1:21:00 at the HM. I was probably faster than 1:21, because I melted down pretty hard at the end of that race in the last few miles, so the real split was probably under 1:21.
This, of course, is taking into account the 1m31s shit-stop that I subtract off my official 25k time. Yeah, I got a short breather, but think of the air I was breathing. Plus, I never quite got my pace back after that stop.