Race Report: Big Lake Half Marathon

Hi All-
My mom is so great. She got up this morning with me at 6am, to drive 90 minutes to Alton Bay, NH to watch and cheer me on in a deluge of rainstorms.
May I take this moment, to congratulate all finishers of this year's race, as it was an utter fight. We all became saturated, and we encouraged one another to persevere through the elements; We were all inherently insane today, and we all finished. I love you guys.
I faced an enormous muscle spasm at mile 5.4, due to the crowned nature of the highway we were running on. It came in the form of my right lateral hip flexor
It abaded, although not until the final 3 miles, did I really find my rhythm.
I took my first ice bath last evening, for about 12 minutes or so, and nearly bit through the binding on the hardcover book I was intending to read, the pain was so great.
The first clear and noticeable presence in the run, was the soreness, and laziness of my quadriceps. Just felt relatively tired, and unresponsive.
I progressed, and as aforementioned, I really opened up in the last few miles. Felt so great, like on air.
I am in question: Why do I feel the most fluid, at what should be the most taxing part of the race course?
I don't know the answer. But I do know, that despite these conditions, we all persevered, and it is a testament to this great sport of endurance.
Dry well my friends.