Thanks guys! This was just me running alone around a pond basically. I wasn't even planning to do it, just saw that the weather was nice and felt like that might be the day to try.
I can't even fathom what it would feel like to run the whole thing! TBH I'm not nearly good enough to show any decent results on the HM; in fact I'm definitely not doing it again for a while, need far more endurance for it to be safe.