The University of California (UC) 4-H Mindfulness Retreat was developed on the basis of current research of positive youth outcomes associated with mindfulness. Curricula, resources, and programming were developed to introduce participants to mindfulness to improve overall health. The UC 4-H Mindfulness Retreat provides training and opportunities to teens and adults in the areas of mindfulness, nutrition, physical activity, stress management, relationship building, community connection, and advocacy. We present outcomes, successes, and lessons learned related to developing and executing a statewide mindfulness retreat for youths and adults.