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More than 3,500 runners turned out Sunday for the Second Annual MO' Cowbell Half Marathon and 5K race.

Participants received cowbells to carry with them on the course, which took them from Frontier Park in St. Charles to New Town and back. The number of runners was up greatly from the almost 1,500 at last year's event.

The race is organized by Partners for Progress of Greater St. Charles with the assistance of Big River Running Company as a fitness and community event for young professionals.