Martina Elworthy, dressed as The Great Pumpkin and Snoopy, rides on horse Penny during a “Painted Pony Party” Oct. 22. Families and horses turned out in costume for the event, sponsored by the Los Altos Horsemen’s Association at the Los Altos Hills Town Riding Ring on Purissima Road. The event was free and open to the public, and association members volunteered their horses for decoration and riding. The party gave pony painting - a Native American tradition - a Halloween twist with masks, feathers and hats for the patient horses. Horses volunteered by the association were joined by special guest Cloud, a white miniature pony from the neighborhood.