The current study examines trajectories of treatment outcomes 6 months after completion of a peer parent program, "NAMI Basics." Fifty-two caregivers who were part of a larger trial completed questionnaires prior to, immediately after, and 6 months after completing "NAMI Basics." Growth curve models were used to examine trajectories of caregiver ratings of parent activation and engagement, parent help-seeking intentions, child symptoms, outpatient service use, and parent stress at 6 months after completion of the program. Prior improvements to the outcomes of parent activation and engagement ([beta] = 2.31, p < 0.001, d = 1.35), parent help-seeking intentions ([beta] = 1.94, p = 0.017, d = 0.69), and child intrapersonal distress ([beta] = -3.93, p = 0.046, d = 0.58) were maintained at 6 months, while help-seeking intentions was not ([beta] = 1.31, p = 0.222, d = 0.47). Though no changes were observed immediately post-class, caregivers reported significant increases in outpatient services use ([beta] = -1.51, p = 0.030, d = 0.68) and reductions in parenting stress ([beta] = - 4.99, p = 0.009, d = 0.75) and overall child symptoms ([beta] = -19.67, p = 0.001, d = 0.90) at 6 month follow-up. These results suggest that many of the positive impacts of the "NAMI Basics" program are sustained 6 months after the intervention. Additionally, these results suggest that some positive outcomes of the program may not emerge until several months after taking the class. Implications and future directions are discussed.