We create opportunity for those impacted by the chaos of addiction and mental illness through innovative, compassionate, and life-changing care. Need Help Now? If you need immediate assistance, please call 1-800-227-3953. We create opportunity for those impacted by the chaos of addiction & mental illness through innovative, compassionate & life changing care. Rimrock is the largest drug and alcohol treatment center in the region, serving adults and adolescents with substance use and co-occurring disorders. Rimrock views addiction as a whole person illness affecting an individual’s emotional, physical, spiritual and social well-being. We create opportunity for those impacted by the chaos of addiction & mental illness through innovative, compassionate & life changing care.