Notes
I did the first 12 miles in ~2 hours on the roads, then a quick driving transition :) to Fitness Warehouse for the last 8.
Actually I felt better outside. It wasn't too hot because the route is shady in most parts and there was a tiny breeze. I had plenty of melting frozen gatorade and water along the way. It was horribly humid which made me slow, heavy, and drenched, but still wasn't miserable by any means. What bothers me is slowing to 10 min/miles over time makes my feet ache from the different pace and I guess, more plodding?
The treadmill was a battle of wills for sure (monthly cramps struck). I won. Barely.