I graduated HS in 2006 and can't remember my XC PR despite running dozens of XC races back then. I also took track pretty seriously and don't remember my 3200 PR, though I do remember my 800 and 1600 PRs.
Anyone else in the same boat? I definitely remember my lifetime PRs in all the distances that I've cared about (400, 800, 1500, mile, 3000, and 5000), it's just my HS times that are a bit vague.