Shana O’Brien and Cassie Leonard made a pledge to be more active in 2013 by getting back into running.Day one: so far, so good.The two Vancouver residents were among more than 200 participants in Tuesday’s Hangover Run, an annual New Year’s Day event put on by the Clark County Running Club. O’Brien said their resolution actually began before the new year, but walking the 5-kilometer (3.1-mile) race offered a chance to start 2013 on the right foot.“This seemed like kind of a good way to make it official,” O’Brien said.Added Leonard: “Our first official act of 2013 was to join the Clark County Running Club.”Participants braved cold conditions for Tuesday’s Hangover Run, now in its 40th year. Temperatures remained in the 20s as people arrived at the Fort Vancouver National Historic Site. Runners nervously bounced, paced or jogged — anything to stay warm — before the race started along East Fifth Street, next to the fort and Pearson Field.There was no starting gun. Clark County Running Club President Russ Zornick counted down from three to send runners on their way. One participant answered back: “Happy New Year!”Race has grownVancouver resident Jenny Teppo said she’s been taking part in the Hangover Run for more than 20 years. She remembers a very different event in the early 1990s.“It used to just be kind of a core, small group of us,” Teppo said.From just a few dozen participants back then, the event has topped 200 in recent years. It draws a wide range of runners now, she said, young and old, entire families, or local students looking for a training run.