Six weeks ago I announced my goal Chicago finishing time of 3:10, predicated upon ideal weather. However, as the date draws near it's clear that the conditions will be decidedly sub-optimal. The temperature will be warm, from 64 to 79°F, sunny, and somewhat humid with a dew point of ~50°F.
Nevertheless, my plan remains to run with the 3:10 pacing team. I've trained for this race in comparable, and even warmer conditions. I'm ready to follow my hydration, fueling and electrolyte plan while taking into account the advice provided by the Chicago Marathon staff.
At every 10K marker I will gauge my exertion level at the pacing team's 7:15 pace. If I feel that I'm excessively pushing or straining I will bid adieu to the group and gradually ease-up a bit on my pace. It'd be great to knock down a 3:10. However, if it isn't the day then I'm OK. Wish me luck!