Sierra is the biological daughter of Lucinda Walsh and Prince Jacob Estaban of Montega. She was briefly married to Tonio Reyes, whom she left to marry the man that became the love of her life, Craig Montgomery. Sierra and Craig married, but divorced when she found he knew her biological mother Mary Ellen Walters was the billionaire CEO of Walsh Enterprises, Lucinda Walsh. Craig and Sierra share two children, the late Bryant Montgomery who was killed in a car accident in 2001 and Lucy Montgomery. Sierra was last seen after her final marriage to Alan Drake ended when he was murdered. Sierra Drake has since been living abroad in unknown parts.
Sierra Estaban Drake is scheduled to return to Oakdale in 2010.