The historic gold rush town of Mariposa will be ghoulishly decorated for its annual Halloween Downtown on Oct. 31.  That evening, from 5 p.m. to 7 p.m., visitors will mix with locals at the town’s Annual Halloween Carnival held at the Mariposa County Fairgrounds.  Sponsored by the Mariposa Lions Club and presented by Mariposa Safe Families, Inc. the carnival will include game booths, prizes, food, a fire safety house, tub o’ treats and other family .Sponsored by Mariposa Lions Club.