PB&J Fuel Run 5K/10K/13.1 CHICAGO/EVANSTON

PB&J Fuel Run 5K/10K/13.1 CHICAGO/EVANSTON is held in Chicago, Illinois, on October 31, 2026. Runners can choose a half marathon (13.1 miles), a 10K, a 5K or a one-mile family fun run, with every format setting off at 7:30 a.m.

Late October puts this race at a useful point in the year: far enough into the fall season to show what your summer training was worth, and early enough to launch a winter block off the back of it. Used that way, the half is a benchmark rather than a peak — race it honestly, take an easy week afterward, then build again. If you are newer to the sport, the 5K asks for very little preparation and still teaches you the things that matter, starting with how much slower a sensible first mile feels than you expect.