I did the last 10.5 miles of the course, through the Newton, Brookline, and into Copley, and i was absolutely drained. The first five miles or so i was running in direct sunlight, through the Newton hills and Heartbreak Hill, and i was sweating like a pig! It's amazing how tired warm weather and sunlight can make your body.
i am PRAYING that the weather is cooler on April 19th!!