On this, my second Chicago Marathon I was only passably prepared, and my overall time reflected same. While not an absolutely horrible time it was a true learning experience! Being excessively optimistic as to my pace I had my eyes set on running a 3:30, so ran with the 3:30 pacing group approximately through the half-marathon mark. However, shortly after passing my family at mile 13.5 I suddenly began losing my leg strength, and had to slow-down. My slow-down continued until by mile 21 or so I was doing the run-walk shuffle! True learning experience.... Better know your potential pace (easily gauged via the famous "Yasso 800" methodology (see link)
Official Race Results: Time: 04:12:30; Age 45-49: 1071/2115; Male: 9515/18389; Overall: 13538/32706