Get ready to lace-up those running shoes, the Walnut Creek International Half-Marathon and 5K Race takes place Saturday.

And for Walnut Creekers who live along the race route of Treat Boulevard, Bancroft Road, Oak Grove Road and Ygnacio Valley Road, either get ready to cheer runners on, stay home or be prepared for driving delays.

More than 2,000 runners are expected to hit the streets Saturday for the race, now in its third year. From 7 to 10 a.m., race organizers warn that there may be traffic delays along the course route.

In 2011, the race -- on a different course than last year or this year -- snarled traffic and created massive delays, prompting hundreds of complaints from residents.

Now a giant loop, the course begins in downtown Civic Park, heads across Ygnacio onto Civic Drive and eventually onto Treat Boulevard and toward Cowell Road in Concord. At Cowell, runners will turn right and head over to Ygnacio Valley Road, on which they will return into Walnut Creek in the outer lane of the street. At Heather Farm Park, runners will veer right go through the park eventually ending up on the Iron Horse Trail and finish back in Civic Park.

The Walnut Creek Half Marathon will be the last race of the California Half Marathon Series.

The race raises money for World Vision, a Christian humanitarian organization, and for local school athletic booster clubs. For more information, to see the course map or to register for the race go to www.runwalnutcreek.com/

Contact Elisabeth Nardi at 925-952-2617. Follow her at Twitter.com/enardi10.