I'll take the flack on this one since I'm the measurer of record. When the course was originally measured, the open 5k was to finish the same as the elite 8k, w/ 500m on the track. At the last minute it was decided that this wouldn't work, since the runners who finished would have no way to get off the infield without crossing the line of runners still finishing, so the finish setup that was used was designed. As a result, the orginal start line was moved back 400m to make up for the distance lost on the track. I did this Friday morning in between taking Deena, Jen Rhines and Ryan Shay for a tour of the 8k course. In my haste to get back to Manhattan I forgot to adjust the 1 and 2 mile points by a similar distance, and when going out to mark them later that day it also failed to occur to me.
I knew something was up during the race (I ran it too) when my 1km split was closer to what I thought I'd be hitting at the mile, and the mile was just as slow. Believe me all kinds of thoughts, none of them good, raced through my head at this point, trying to figure out how I'd screwed this up, how I'd measure what the true distance was, and worst, if the same error had crept into the elite 8km races to follow.
When I got to 2km the pace was back to what I'd expected, and I was able to deduce my mistake, and realized the overall distance was correct.
That's the bottom line, but I realize that mislocated splits can mess up people's pacing plans and play havoc with their race psyche - believe me, it did with mine.
So, the good news is that the overall distance was 5,000 meters. It's just the way it was sliced up that was wrong. As someone who's measured Olympic Trials courses and validated world record runs, I should know better, but this time, I made a mistake. Fortunately, it wasn't a horrible one like a mismeasured total distance, and everything was perfect for the 8k races. If Deena had run 3 seconds faster I'm confident the course would have stood up to validation.
Congrats to all the organizers and other involved. If you'd seen the course back in February when it was first conceived, you'd know how much work has been done.