Everything seemed okay when I arrived at the race site, but confusion ended up being the word for the day. Five minutes after the 10K start, they started the "5K" runners on what they had described as an out and back with a short loop through a neighborhood.
However, that's not how it played out. As you can see, I ended up running a loop (no out-and back) that measured ~4.5miles according to my Garmin.
It wouldn't be so bad if all the "5K" runners did the same loop, but at some point they realized that runners were being sent the wrong way and got that corrected. They also sent some volunteers out in a car to turn some of the runners back around. So there were at least three permutations of 5K runners: 5K runners who ran a 5K, 5K runners who ran a 4.5 mile loop, and 5K runners who ran something longer than a 5K but less than 4.5 miles. What a mess!
I didn't bother to stick around for official results. The results are totally bogus since not everyone ran the same distance! As you might expect, some people were very unhappy. Edited to add - They posted the results and I actually won my age group women 40-49 and was 19 of 100 "5K" runners overall, not that it means that much with all the confusion on the course
As for me, I finished without knee pain and got a little longer run in than I had planned, what's not to love about that?!? Project "Return to Half-Marathon Training" is a GO. Woot!!
Some number courtesy of Garmin:
* My 5K split was 30:12, a 9:44 pace. Coming straight off a knee injury, that's good enough for me!
* My 7K split was 43:14, a 9:57 pace. I slowed down to something closer to my 10K pace when I realized the course was going long.
* The loop was 7.2K in length, I finished in 44:17, a 9:56 pace.