Solstice RTC is a residential treatment center, with a fully integrated academic program, designed for the treatment and education of troubled teen girls ages 14-18. Solstice RTC is a residential treatment center specifically designed for the treatment of young women ages 14-18. Solstice has treated hundreds of struggling teen girls along their path to recovery; from challenges such as depression, anxiety, mood disorders, trauma (and associated symptoms), substance abuse/addiction, and behavioral addiction (food, exercise, gaming).