One of Denver's largest running races, the Cherry Creek Sneak (April 29), celebrates its 30th anniversary this year with the addition of a 10-mile run to an already packed lineup of run/walk options. Cross the finish line and head straight to a block party with free beer from Wisconsin’s Jacob Leinenkugel Brewing Company. Register at cherrycreeksneak.com.

*An earlier version of this story said that the Cherry Creak Sneak was Colorado's largest running race.