sub-3 or blow-up trying

Rough morning...I entered a 20k in which I have chosen not to record as a "race report."  It was high 70's at the starting line w/90% humidity.  I don't fair well in those conditions for distance racing, yet I was determined to give race effort as a training run.  My achilles were sore and I lost one of my compression socks in the laundry, so my wife picked up a $5 pair at CVS which gave me about $5 worth of help.  Did a 2-mile warm-up before the start and then my garmin would not function...looked to be one of those kind of days...here' my splits by the clock...

Mile 1- 6:12

Mile 2- 6:25

Mile 3- 6:32

Mile 4- 6:44

Mile 5- ??? Stopped along a curb to take off my compression socks which were becoming a real nuisance...did my best to try to return back into some sort of groove- lost about 1minute to take off socks and restring shoes

10k marker- 42:20 (decided to try to keep 7min pace as long as possible and then maybe accelerate at the end.

mile 7- 6:55 (and fading fast)

mile 8- ??? (now my achilles began to act up and I fought them for about 1/2 a mile before shifting to more of an 8:30ish pace)

mile 11- stopped, walked about 1/2 a mile and then sat on a curb to massage my achilles.

Final mile- picked up the pace just for kicks and passed dozens of runners, sprinting at the end to show off to my family (who were concerned about my coming in 14 minutes slower than goal pace)- put in about a 6:40ish mile to close things off- 1:37:00 total time...ouch!!

There'll be better days I'm sure- my wife finished in 2hrs flat (add a few seconds) and my daughter ran a 27min 5k.  All went out for Mexican afterwards...think I'll put in another run later on to blow off steam. 

Later in the day...jogged down to the track to blow some steam...did 5x400 (81,80,79,79,79) and then jogged back home for 6.6 total.