Hi PJ:
I ran the 1/2 marathon in the Lost Dutchman too! WOW! Would have liked to say hi ...... bummer! It was pretty chilly, sprinkling rain, some breeze now and then, around 50 degrees!
I rarely get 'sick' so wouldn't you know it, I was fighting a head cold all week with some lingering congestion, so today's race was pretty sluggish for me. I did finish in 1:55 .......... not bad, considering how I was feeling but I was hoping for between 1:45 - 1:50.
I came in 273 overall out of 1069 runners, 7th in my age category.
I didn't like the course. I didn't like the event overall. I thought it was a trail course. I don't like road courses. And, the weather certainly didn't help. Yeah, not very happy with my run today.
More importantly, my right knee has an issue. During one of my training runs about two weeks ago, I slipped on some ice/snow down a hill, grabbed a branch which kinda softened my fall but my tailbone hit a large smooth rock jutting out of the ground and covered with ice. Needless to say, the left side of my tailbone has been a pretty shade of deep purple with a huge bump for the last few days!!! 
Hurts to sit or lay on my left side. But it didn't affect my training runs in regard to leg muscles/ankles, etc.
Well, last Saturday, I did some intervals, about 10 miles on the treadmill and noticed some 'stiffness' but I was in denial ...........thinking I need to 'run it off' ..... but that evening, my knee was swollen.
I know my right knee kinda gave out when I fell but I didn't think I pulled or strained anything.
I have been icing it and resting it for four days, and then the head cold/congestion set in all last week. Darn!!
So I didn't get a good run in as I rested till Friday when I did an EASY workout by running slowly 2 miles, cycle 5 miles, elliptical 30 minutes, weights 30 minutes.
Think I over did it?!? bummer!! And it snowed here Friday, Saturday and Sunday (today) so it is pretty cold which didn't help, I'm sure.
I wear a knee brace below my right knee during my training runs and races.
But, in today's race, I felt my leg muscles tiring at mile 9 and suddenly felt my right knee 'pop' into place at mile marker 10.5 ........ it was weird. I had a good pace with a couple of other guys but I slowed down just to see if anything else would happen. I thought about stopping but I ran up to mile 11 when I took a walk break, hoping that that was all it needed.
It started to sprinkle again, I felt the chills and my throat got sore.
I decided to go for it and ran the last two miles trying to catch the two guys but I could feel my knee swelling up again, it didn't 'hurt' but can feel some inflammation.
It is tender now and I have been icing it most of the evening. Still feel some chills, coughing, sniffles, sore ...... but refuse to get 'sick'. LOL! Need to recover for a few days for sure. I have a business trip to Denver so that should help in recovering and resting.
I have another HM on March 12th, a technical trail course, and I know it is a TRAIL COURSE ......... but its description of the course is interpreted into meaning I may not finish under 2 hours. Love these type of challenges!