From the Walnut Creek Walks page:
December 10, 2011 “Shopper’s Special: Off the Beaten Path”
Meander through the alleys and passageways of downtown Walnut Creek, and discover hidden treasures and historical tidbits. The walk starts at 10 a.m. in front of the Lesher Center for the Arts, and will end at the Broadway Plaza fountain. From there, can catch up on holiday shopping, meet a friend for lunch, or ride the Free Trolley back to the Lesher Center. Plenty of parking is available at the North Locust Street garage, next to the Lesher Center for the Arts.
There will be different walking tours on Jan. 14 and Feb. 11 as well.