Grant Park was filled with people this weekend, though the scene was a far cry from the throngs of teenagers that flock to Lollapalooza in August. Instead, 45,000 runners and thousands of spectators took over Chicago's front yard for the annual Chicago Marathon. As usual, crowds gathered at locations along the city-spanning course of display clever signs and cheer on participants. Check out photos of every stage of the race, from the starting corrals to the finish line.
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