This is the first paragraph in 26.2 Marathon Stories by Katherine Switzer and Roger Robinson. I think it is a great description of marathon morning.
THE PRELUDE TO A MARATHON is one of life’s strangest yet most vivid times. It is a time of intensity yet relaxation, apprehension yet resolve; a time of deeply introspective solitude in the midst of the biggest jostling throng most of us will ever join. So many people, intent on a separate inward commitment, but united in one common physical endeavor. Our motive is private, the context public. We are strangers who are instant comrades, competitors bonded by the shared knowledge that we are all about to undertake one of the hardest tasks in our lives. Ahead lie strenuous effort, weariness, and pain, but we will endure it voluntarily, for the sheer enjoyment of trying.