I have a love-hate relationship with race result predictors, like the one at marathonguide.com. This is what it said from my 10k time from last Saturday:
"Based on our calculations, you could perform at these times over these distances. If you are in much better shape than expected in our theoretical model, then your times will be less spread out. Conversely, if you are in worse shape then your times may be more dispersed."
Half Marathon 2:14:33
The good news is that was my fastest race result ever (well, since the 1980s), at any distance. The other good news is that a sub-5-hour marathon may finally(!) be within reach for me at Marine Corps this autumn.
The bad news is that I haven't made those times at either shorter or longer distances than 10 kilometers. So I have a lot of hard work ahead of me in order to hit those marks.
Um, before I retire from running, that is.