Do Something B1G. The 5th running of the BTN Big 10K will be one event you can't miss. Join thousands of fans on Sunday, July 23rd in Chicago, and represent your Big Ten allegiance by sporting your team's colors in the 10K race or 5K run/walk. Afterward, kick-off the Big Ten football season in style at the ultimate post-race FanFest and Tailgate party. Televised on the Big Ten Network- it's the hottest ticket in town!