Expires June 30, 2010. Redeemable only at McDonald's Antioch, Ashland, Bay Point, Brentwood, Concord, Danville, Discovery Bay,Dublin, Hayward, Lafayette, Martinez, Oakley, Pittsburg, Pleasant Hill, Pleasanton, San Ramon, Walnut Creek, Fairfield, Castro Valley and San Leandro, CA .  Present certificate before ordering.  Limit one certificate per person per visit.