Bipolar disorder is a chronic and often disabling illness affecting 1-2% of US adults. Peer support programs are an innovative and promising model to reverse demoralization, activate consumers to seek more effective care, develop consumers' self-management skills, and restore participation in work and other social roles. Peer-led programs can address key barriers to dissemination of effective psychosocial treatment. This pilot effectiveness trial will evaluate the feasibility, acceptability, and effectiveness of a structured peer support program based on the Certified Peer Specialist Program of the Depression and Bipolar Support Alliance (DBSA). Following the philosophy of recovery, the intervention focuses on: