On Saturday, 12,000 people will run a 5K through the Short North while being showered in powdered color. Sounds like a party.

Even if you haven't heard of the Color Run, you are sure as heck going to see it if you're in a certain stretch between Downtown and the Short North on Saturday morning. You'll know it by the trippy rainbows of (totally food safe but not recommended for deliberate ingestion) powdered color being thrown over 12,000 people who think it's fun to run 3 miles outside in July.

It's billed the "happiest 5K on the planet." It certainly seems to be the fastest growing one - the Color Run started earlier this year as a single event in Arizona and has now grown to 40 locations nationwide. The Columbus event is sold out, but organizers say they're always looking for volunteers (no guarantees you'll get to be a thrower of color). This will be as much a sport for the spectators as it is for the participants. Visit the event website for details on volunteer opportunities.

For anyone who doesn't want green powder in her Northstar frittata, the run route is: Nationwide Boulevard, east on Front Street, north on Park Street, west on Buttles Avenue, north on Dennison Avenue, east on Fourth Avenue, south on High Street, west on Spring Street to the finish. The race starts at 9 a.m.