The Bank of America Chicago Marathon is one of the largest marathons in the world. It is also one of the fastest. Year after year, it has featured some of the finest fields in the world. This year, it celebrates the thirtieth anniversaries of the wins by Steve Jones and Joan Benoit Samuelson. Steve Jones ran 2:07:13, missing the world record by one second, and Joan Benoit Samuelson ran 2:21:21, missing the then WR by sixteen seconds! With no pacemakers in 2015, it will be fascinating to see just show fast these runners can go!