Runners stretched on Liberty Avenue in the moments before the start of the 2017 Pittsburgh Marathon. (Andrew Rush/Post-Gazette)Runners gather beside the August Wilson Center on Liberty Avenue, just a block or so from the start of the race. (Steve Mellon/Post-Gazette)Corey McKelvey of the North Side prepares for the race. (Steve Mellon/Post-Gazette)Elite runners get ready for the start. (Steve Mellon/Post-Gazette)Elite runners take off after the sound of the starter’s pistol. (Steve Mellon/Post-Gazette)A number of flag-carrying runners are on the course this year. (Andrew Rush/Post-Gazette)Runners make their way through the Strip District in the first few miles. (Stephanie Strasburg/Post-Gazette)Looking down on Penn Avenue in the Strip District. (Stephanie Strasburg/Post-Gazette)Penn Avenue and 18th Street was packed. (Stephanie Strasburg/Post-Gazette)The lead runners make their way down Liberty Avenue in Bloomfield. (Nate Guidry/Post-Gazette)Runners make their way through the North Shore underneath highway bridges during the 2017 Pittsburgh Marathon on May 7, 2017. (Andrew Rush/Post-Gazette)Spectators watch as runners make their way down Liberty Avenue. (Andrew Rush/Post-Gazette)Runners in Star Wars themed costumes on the North Side. (Andrew Rush/Post-Gazette)Runners began to celebrate as they approached the finish line on Boulevard of the Allies. (Steve Mellon/Post-Gazette)Gina Merante of Bloomfield hand out bananas to runners along Liberty Avenue in Bloomfield. (Nate Guidry/Post-Gazette)First man to cross the finish line was Jacob Chemtai of Kenya (left). First woman to cross was A.D. Hailemaryam. (Larry Roberts/Post-Gazette)