From the City of Walnut Creek Saturday Walks webpage:
October 20, 2012 Along the canals of Walnut Creek Click for walking guide.
An easy canal-side 4-mile walk on two regional trails, one statewide trail, and one nationwide trail, all in Walnut Creek! Meet at Heather Farm Community Center, 301 N. San Carlos Drive, for an 8:30 a.m. departure. Note date change to 3rd Saturday of the month for October only!